Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2006

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 67621 - 67650 of 74587

Full-Text Articles in Entire DC Network

Experimental Limits On Weak Annihilation Contributions To B -> Ul Nu Decays, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, J. J. Thaler, E. J. White, J. Wiss, M. R. Shepherd, D. M. Asner, K. W. Edwards, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, K. Arms, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, J. A. Mueller, V. Savinov, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, C. Boulahouache, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, A. J. Weinstein, R. A. Briere, G. P. Chen, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins Jan 2006

Experimental Limits On Weak Annihilation Contributions To B -> Ul Nu Decays, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, J. J. Thaler, E. J. White, J. Wiss, M. R. Shepherd, D. M. Asner, K. W. Edwards, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, K. Arms, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, J. A. Mueller, V. Savinov, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, C. Boulahouache, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, A. J. Weinstein, R. A. Briere, G. P. Chen, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins

Department of Physics and Astronomy Faculty Publications

We present the first experimental limits on high-q(2) contributions to charmless semileptonic B decays of the form expected from the weak annihilation (WA) decay mechanism. Such contributions could bias determinations of vertical bar V(ub)vertical bar from inclusive measurements of B -> X(u)l nu. Using a wide range of models based on available theoretical input we set a limit of Gamma(WA)/Gamma(b -> u)< 7.4% (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of vertical bar V(ub)vertical bar.

Go to article

Dielectron Widths Of The Upsilon(1s,2s,3s) Resonances, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, K. Arms, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, V. Savinov, O. Aquines, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins Jan 2006

Dielectron Widths Of The Upsilon(1s,2s,3s) Resonances, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, K. Arms, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, V. Savinov, O. Aquines, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins

Department of Physics and Astronomy Faculty Publications

We determine the dielectron widths of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) resonances with better than 2% precision by integrating the cross section of e(+)e(-)->Upsilon over the e(+)e(-) center-of-mass energy. Using e(+)e(-) energy scans of the Upsilon resonances at the Cornell Electron Storage Ring and measuring Upsilon production with the CLEO detector, we find dielectron widths of 1.252 +/- 0.004(sigma(stat))+/- 0.019(sigma(syst)) keV, 0.581 +/- 0.004 +/- 0.009 keV, and 0.413 +/- 0.004 +/- 0.006 keV for the Upsilon(1S), Upsilon(2S), and Upsilon(3S), respectively.

Go to article

New Measurements Of Cabibbo-Suppressed Decays Of D Mesons With The Cleo-C Detector, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, V. Savinov, O. Aquines, Z. Li, A. Lopez, H. Mendez, J. Ramirez, B. Xin, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton Jan 2006

New Measurements Of Cabibbo-Suppressed Decays Of D Mesons With The Cleo-C Detector, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, V. Savinov, O. Aquines, Z. Li, A. Lopez, H. Mendez, J. Ramirez, B. Xin, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton

Department of Physics and Astronomy Faculty Publications

Using 281 pb(-1) of data collected with the CLEO-c detector, we report on first observations and measurements of Cabibbo-suppressed decays of D mesons in the following six decay modes: pi(+)pi(-)pi(0)pi(0), pi(+)pi(+)pi(-)pi(-)pi(0), pi(+)pi(0)pi(0), pi(+)pi(+)pi(-)pi(0), eta pi(0), and omega pi(+)pi(-). Improved branching fraction measurements in eight other multipion decay modes are also presented. The measured D ->pi pi rates allow us to extract the ratio of isospin amplitudes A(Delta I=3/2)/A(Delta I=1/2)=0.420 +/- 0.014(stat)+/- 0.016(syst) and the strong phase shift of delta(I)=(86.4 +/- 2.8 +/- 3.3)degrees, which is quite large and now more precisely determined.

Go to article

Determination Of The Mechanism For Resonant Scattering In Lamno3, Q. Shen, I. S. Elfimov, P. Fanwick, Y. Tokura, T. Kimura, K. Finkelstein, R. Colella, G. A. Sawatzky Jan 2006

Determination Of The Mechanism For Resonant Scattering In Lamno3, Q. Shen, I. S. Elfimov, P. Fanwick, Y. Tokura, T. Kimura, K. Finkelstein, R. Colella, G. A. Sawatzky

Department of Physics and Astronomy Faculty Publications

The resonant multiple Bragg x-ray diffraction is used to study the forbidden (10 (4) over bar) reflection in LaMnO3. Using the interference between the three-beam scattering and resonant scattering we can determine the phase of the resonant scattering. This phase is shown to be consistent with a model in which the resonant scattering is caused by the influence of the Mn-O bond length distortion rather than directly by the orbital ordering on the Mn 4p band structure.

Go to article

Multiwavelength Observations Of The Blazar Markarian 421 In 2002 December And 2003 January, P. F. Rebillot, H. M. Badran, G. Blaylock, S. M. Bradbury, J. H. Buckley, D. A. Carter-Lewis, O. Celik, Y. C. Chow, P. Cogan, W. Cui, M. Daniel, C. Duke, A. Falcone, S. J. Fegan, J. P. Finley, L. F. Fortson, G. H. Gillanders, J. Grube, K. Gutierrez, G. Gyuk, D. Hanna, J. Holder, D. Horan, S. B. Hughes, G. E. Kenny, M. Kertzman, D. Kieda, J. Kildea, K. Kosack, H. Krawczynski, F. Krennrich, M. J. Lang, S. Le Bohec, E. Linton, G. Maier, P. Moriarty, J. Perkins, M. Pohl, J. Quinn, K. Ragan, P. T. Reynolds, H. J. Rose, M. Schroedter, G. H. Sembroski, G. Steele, S. P. Swordy, L. Valcarcel, V. V. Vassiliev, S. P. Wakely, T. C. Weekes, J. Zweerink, M. Aller, H. Aller, P. Boltwood, I. Jung, D. Kranich, K. Nilsson, M. Pasanen, A. Sadun, A. Sillanpaa Jan 2006

Multiwavelength Observations Of The Blazar Markarian 421 In 2002 December And 2003 January, P. F. Rebillot, H. M. Badran, G. Blaylock, S. M. Bradbury, J. H. Buckley, D. A. Carter-Lewis, O. Celik, Y. C. Chow, P. Cogan, W. Cui, M. Daniel, C. Duke, A. Falcone, S. J. Fegan, J. P. Finley, L. F. Fortson, G. H. Gillanders, J. Grube, K. Gutierrez, G. Gyuk, D. Hanna, J. Holder, D. Horan, S. B. Hughes, G. E. Kenny, M. Kertzman, D. Kieda, J. Kildea, K. Kosack, H. Krawczynski, F. Krennrich, M. J. Lang, S. Le Bohec, E. Linton, G. Maier, P. Moriarty, J. Perkins, M. Pohl, J. Quinn, K. Ragan, P. T. Reynolds, H. J. Rose, M. Schroedter, G. H. Sembroski, G. Steele, S. P. Swordy, L. Valcarcel, V. V. Vassiliev, S. P. Wakely, T. C. Weekes, J. Zweerink, M. Aller, H. Aller, P. Boltwood, I. Jung, D. Kranich, K. Nilsson, M. Pasanen, A. Sadun, A. Sillanpaa

Department of Physics and Astronomy Faculty Publications

We report on a multiwavelength campaign on the TeV gamma-ray blazar Mrk 421 performed during 2002 December and 2003 January. These target of opportunity observations were initiated by the detection of X-ray and TeV gamma-ray flares with the All Sky Monitor (ASM) on board the Rossi X-Ray Timing Explorer (RXTE) and the 10 m Whipple gamma-ray telescope. The campaign included observational coverage in the radio (University of Michigan Radio Astronomy Observatory), optical (Boltwood, La Palma KVA 0.6 m; WIYN 0.9 m), X-ray (RXTE pointed telescopes), and TeV gamma-ray (Whipple and HEGRA) bands. At TeV energies, the observations revealed several flares …

Go to article

Ultrasensitive Mass Sensing Using Mode Localization In Coupled Microcantilevers, M. Spletzer, A. Raman, A. Q. Wu, X. F. Xu, R. Reifenberger Jan 2006

Ultrasensitive Mass Sensing Using Mode Localization In Coupled Microcantilevers, M. Spletzer, A. Raman, A. Q. Wu, X. F. Xu, R. Reifenberger

Department of Physics and Astronomy Faculty Publications

We use Anderson or vibration localization in coupled microcantilevers as an extremely sensitive method to detect the added mass of a target analyte. We focus on the resonance frequencies and eigenstates of two nearly identical coupled gold-foil microcantilevers. Theoretical and experimental results indicate that the relative changes in the eigenstates due to the added mass can be orders of magnitude greater than the relative changes in resonance frequencies. Moreover this sensing paradigm possesses intrinsic common mode rejection characteristics thus providing an alternate way to achieve ultrasensitive mass detection under ambient conditions. (c) 2006 American Institute of Physics.

Go to article

Explorations Of The Magnetization Of Ga1-Xmnxs Over A Wide Range Of Concentrations, 0.008 < X < 0.18, J. L. Tracy, R. Mourad, J. Garner, T. M. Pekarek, I. Miotkowski, A. K. Ramdas Jan 2006

Explorations Of The Magnetization Of Ga1-Xmnxs Over A Wide Range Of Concentrations, 0.008 < X < 0.18, J. L. Tracy, R. Mourad, J. Garner, T. M. Pekarek, I. Miotkowski, A. K. Ramdas

Department of Physics and Astronomy Faculty Publications

Calculations and measurements of the magnetization of Ga1-xMnxS, a III-VI diluted magnetic semiconductor crystal, are reported. Results extend over a wide range of concentrations: x=0.18, 0.13, 0.099, 0.079, 0.062, 0.032, and 0.008. The magnetization was measured at temperatures from 50 to 400 K in magnetic fields up to 7 T. The experimental data are compared with a model of the magnetization that is derived using the energy levels of a singlet Hamiltonian which posits the manganese atoms are not interacting with each other. The Hamiltonian consists of crystal-field, spin-orbit, spin-spin, and Zeeman interactions of the 3d electrons of the Mn+3 …

Go to article

Magnetic Excitations Of Stripes And Checkerboards In The Cuprates, D. X. Yao, E. W. Carlson, D. K. Campbell Jan 2006

Magnetic Excitations Of Stripes And Checkerboards In The Cuprates, D. X. Yao, E. W. Carlson, D. K. Campbell

Department of Physics and Astronomy Faculty Publications

We discuss the magnetic excitations of well-ordered stripe and checkerboard phases, including the high energy magnetic excitations of recent interest and possible connections to the "resonance peak" in cuprate superconductors. Using a suitably parametrized Heisenberg model and spin wave theory, we study a variety of magnetically ordered configurations, including vertical and diagonal site- and bond-centered stripes and simple checkerboards. We calculate the expected neutron scattering intensities as a function of energy and momentum. At zero frequency, the satellite peaks of even square-wave stripes are suppressed by as much as a factor of 34 below the intensity of the main incommensurate …

Go to article

Absolute Branching Fraction Measurements For D+ And D-0 Inclusive Semileptonic Decays, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, H. Severini, S. A. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner Jan 2006

Absolute Branching Fraction Measurements For D+ And D-0 Inclusive Semileptonic Decays, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, H. Severini, S. A. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner

Department of Physics and Astronomy Faculty Publications

We present measurements of the inclusive branching fractions for the decays D+-> Xe+nu(e) and D-0 -> Xe+nu(e), using 281 pb(-1) of data collected on the psi(3770) resonance with the CLEO-c detector. We find B(D-0 -> Xe+nu(e))=(6.46 +/- 0.17 +/- 0.13)% and B(D+-> Xe+nu(e))=(16.13 +/- 0.20 +/- 0.33)%. Using the known D meson lifetimes, we obtain the ratio Gamma(+sl)(D)/Gamma(0sl)(D)=0.985 +/- 0.028 +/- 0.015, confirming isospin invariance at the level of 3%. The positron momentum spectra from D+ and D-0 have consistent shapes.

Go to article

Hot One-Temperature Accretion Flows Revisited, F. Yuan, R. E. Taam, Y. Q. Xue, W. Cui Jan 2006

Hot One-Temperature Accretion Flows Revisited, F. Yuan, R. E. Taam, Y. Q. Xue, W. Cui

Department of Physics and Astronomy Faculty Publications

The effectiveness of the thermal coupling of ions and electrons in optically thin, hot accretion flows is investigated in a phenomenological approach. In the limit of complete coupling, we focus on the one-temperature accretion flows around black holes. Based on a global analysis, the results are compared with two-temperature accretion flow models and with the observations of black hole sources. Many features of one-and two-temperature solutions are quite similar. That is, hot one-temperature solutions are found to exist for mass flow rates less than a critical value, i.e.,. M less than or similar to 10 alpha(2)M(Edd), where M-Edd = L-Edd/c(2) …

Go to article

Comment On: Cosmogenic Nuclide Chronology Of Pre-Last Glacial Maximum Moraines At Lago Buenos Aires, 46 Degrees S, Argentina (Quaternary Research 63/3, 2005, 301-315) - Reply, M. R. Kaplan, B. S. Singer, D. C. Douglass, R. P. Ackert, M. W. Caffee Jan 2006

Comment On: Cosmogenic Nuclide Chronology Of Pre-Last Glacial Maximum Moraines At Lago Buenos Aires, 46 Degrees S, Argentina (Quaternary Research 63/3, 2005, 301-315) - Reply, M. R. Kaplan, B. S. Singer, D. C. Douglass, R. P. Ackert, M. W. Caffee

Department of Physics and Astronomy Faculty Publications

No abstract provided.

Go to article

Branching Fraction For The Doubly-Cabibbo-Suppressed Decay D+-> K+Pi(0), S. A. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, T. E. Coan, Y. S. Gao, F. Liu, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, P. U. E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, J. Ernst, H. Severini Jan 2006

Branching Fraction For The Doubly-Cabibbo-Suppressed Decay D+-> K+Pi(0), S. A. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, T. E. Coan, Y. S. Gao, F. Liu, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, P. U. E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, J. Ernst, H. Severini

Department of Physics and Astronomy Faculty Publications

We present a measurement of the branching fraction for the doubly-Cabibbo-suppressed decay D+-> K+pi(0), using 281 pb(-1) of data accumulated with the CLEO-c detector on the psi(3770) resonance. We find B(D+-> K+pi(0))=(2.28 +/- 0.36 +/- 0.15 +/- 0.08)x10(-4), where the first uncertainty is statistical, the second is systematic, and the last error is due to the uncertainty in the reference mode branching fraction.

Go to article

Chandra View Of The Unidentified Tev Gamma-Ray Source Hess J1804-216, W. Cui, A. Konopelko Jan 2006

Chandra View Of The Unidentified Tev Gamma-Ray Source Hess J1804-216, W. Cui, A. Konopelko

Department of Physics and Astronomy Faculty Publications

We present high-resolution X-ray images taken with the Chandra X-Ray Observatory of the field that contains the unidentified TeV gamma-ray source HESS J1804-216. A total of 11 discrete sources were detected with a posteriori significance of > 5 sigma over the entire field of view. Among them, only one, designated as CXOU J180351.4-213707, is significantly extended. The source is about 40" away from the radio pulsar PSR J1803-2137, which was the target of the Chandra observation but was not detected in X-rays. A natural question is whether the two sources are physically related. While it is conceivable that CXOU J180351.4-213707 could …

Go to article

Detection Of Bacillus Subtilis Spores Using Peptide-Functionalized Cantilever Arrays, B. Dhayal, W. A. Henne, D. D. Doorneweerd, R. G. Reifenberger, P. S. Low Jan 2006

Detection Of Bacillus Subtilis Spores Using Peptide-Functionalized Cantilever Arrays, B. Dhayal, W. A. Henne, D. D. Doorneweerd, R. G. Reifenberger, P. S. Low

Department of Physics and Astronomy Faculty Publications

We move beyond anti body-antigen binding systems and demonstrate that short peptide ligands can be used to efficiently capture Bacillus subtilis (a simulant of Bacillus anthracis) spores in liquids. On an eight-cantilever array chip, four cantilevers were coated with binding peptide (NHFLPKV-GGGC) and the other four were coated with control peptide (LFNKHVP-GGGC) for reagentless detection of whole B. subtilis spores in liquids. The peptide-ligand-functionalized microcantilever chip was mounted onto a fluid cell filled with a B. subtilis spore suspension for similar to 40 min; a 40 nm net differential deflection was observed. Fifth-mode resonant frequency measurements were also performed before …

Go to article

Constraining The Number Of Lunar And Martian Meteorite Falls, K. Nishiizumi, M. W. Caffee Jan 2006

Constraining The Number Of Lunar And Martian Meteorite Falls, K. Nishiizumi, M. W. Caffee

Department of Physics and Astronomy Faculty Publications

No abstract provided.

Go to article

Cosmogenic Nuclide Evidence For Minimal Erosion Across Two Subglacial Sliding Boundaries Of The Late Glacial Fennoscandian Ice Sheet, J. Harbor, A. P. Stroeven, D. Fabel, A. Clarhall, J. Kleman, Y. K. Li, D. Elmore, D. Fink Jan 2006

Cosmogenic Nuclide Evidence For Minimal Erosion Across Two Subglacial Sliding Boundaries Of The Late Glacial Fennoscandian Ice Sheet, J. Harbor, A. P. Stroeven, D. Fabel, A. Clarhall, J. Kleman, Y. K. Li, D. Elmore, D. Fink

Department of Physics and Astronomy Faculty Publications

The existence of sliding and frozen bed areas under ice sheets is significant in understanding basal thermal regimes, patterns of erosion and landform development, and in constraining boundary conditions for the reconstructions of ice sheets. Recognition of subglacial boundaries between sliding and frozen-bed areas for former ice sheets is typically based on distinct morphological contrasts between areas with glacial landform assemblages and relict areas showing little alteration of pre-existing features. Some of these boundaries, especially on continental shield areas, however, are clearly visible from air photos but have minimal topographic expression. Understanding the chronology and erosional development of such boundaries …

Go to article

Cosmogenic Radionuclides In A Weathered, 2.8 Million Year Old H Chondrite Found On Top Of Frontier Mountain, Antarctica, K. C. Welten, K. Nishiizumi, L. Folco, M. W. Caffee Jan 2006

Cosmogenic Radionuclides In A Weathered, 2.8 Million Year Old H Chondrite Found On Top Of Frontier Mountain, Antarctica, K. C. Welten, K. Nishiizumi, L. Folco, M. W. Caffee

Department of Physics and Astronomy Faculty Publications

No abstract provided.

Go to article

Determination Of Cosmogenic Cl-36 In Rocks By Isotope Dilution: Innovations, Validation And Error Propagation, D. Desilets, M. Zreda, P. F. Almasi, D. Elmore Jan 2006

Determination Of Cosmogenic Cl-36 In Rocks By Isotope Dilution: Innovations, Validation And Error Propagation, D. Desilets, M. Zreda, P. F. Almasi, D. Elmore

Department of Physics and Astronomy Faculty Publications

Measurements of cosmogenic Cl-36 in terrestrial rocks provide quantitative information about exposure ages of landforms and surface features. The isotope dilution method for preparing Cl-36 samples is now widely used because it allows Cl-36 and Cl to be measured simultaneously on a single accelerator mass spectrometry target, increases the accuracy and precision of Cl determinations, and reduces rock sample size and laboratory work. In this paper we describe a new implementation of isotope dilution to Cl-36 dating, report experimental data verifying the accuracy of this approach, and show how errors in the measured stable isotope ratio propagate to errors in …

Go to article

The Cdf Run Iib Silicon Detector: Design, Preproduction, And Performance, T. Akimoto, M. Aoki, P. Azzi, N. Bacchetta, S. Behari, D. Benjamin, D. Bisello, G. Bolla, D. Bortoletto, A. Burghard, G. Busetto, S. Cabrera, A. Canepa, G. Cardoso, M. Chertok, C. I. Ciobanu, G. Derylo, I. Fang, E. J. Feng, J. P. Fernandez, B. Flaugher, J. Freeman, L. Galtieri, J. Galyardt, M. Garcia-Sciveres, G. Giurgiu, I. Gorelov, C. Haber, D. Hale, K. Hara, R. Harr, C. Hill, M. Hoeferkamp, J. Hoff, B. Holbrook, S. C. Hongn, M. Hrycyk, T. H. Hsiung, J. Incandela, E. J. Jeon, K. K. Joo, T. Junk, H. Kahkola, S. Karjalainen, S. Kim, K. Kobayashi, D. J. Kong, B. Kriege, D. Kruse, N. Kuznetsova, S. Kyre, R. Lander, T. Landry, R. Lauhakangas, J. Lee, R. S. Lu, P. Lujan, P. Lukens, E. Mandelli, C. Manea, P. Maksimovic, P. Merkel, S. N. Min, S. Moccia, I. Nakano, D. Naoumov, T. Nelson, B. Nord, J. Novak, T. Okusawa, R. Orava, Y. Orlov, K. Osterberg, D. Pantano, V. Pavlicek, D. Pellett, J. Pursley, P. Riipinen, B. Schuyler, S. Seidel, A. Shenai, A. Soha, D. Stuart, R. Tanaka, M. Tavi, H. Von Der Lippe, J. P. Walder, Z. Wang, P. Watje, M. Weber, W. Wester, K. Yamamoto, Y. C. Yang, W. Yao, W. Yao, R. Yarema, J. C. Yun, F. Zetti, T. Zimmerman, S. Zimmermann, S. Zucchellil Jan 2006

The Cdf Run Iib Silicon Detector: Design, Preproduction, And Performance, T. Akimoto, M. Aoki, P. Azzi, N. Bacchetta, S. Behari, D. Benjamin, D. Bisello, G. Bolla, D. Bortoletto, A. Burghard, G. Busetto, S. Cabrera, A. Canepa, G. Cardoso, M. Chertok, C. I. Ciobanu, G. Derylo, I. Fang, E. J. Feng, J. P. Fernandez, B. Flaugher, J. Freeman, L. Galtieri, J. Galyardt, M. Garcia-Sciveres, G. Giurgiu, I. Gorelov, C. Haber, D. Hale, K. Hara, R. Harr, C. Hill, M. Hoeferkamp, J. Hoff, B. Holbrook, S. C. Hongn, M. Hrycyk, T. H. Hsiung, J. Incandela, E. J. Jeon, K. K. Joo, T. Junk, H. Kahkola, S. Karjalainen, S. Kim, K. Kobayashi, D. J. Kong, B. Kriege, D. Kruse, N. Kuznetsova, S. Kyre, R. Lander, T. Landry, R. Lauhakangas, J. Lee, R. S. Lu, P. Lujan, P. Lukens, E. Mandelli, C. Manea, P. Maksimovic, P. Merkel, S. N. Min, S. Moccia, I. Nakano, D. Naoumov, T. Nelson, B. Nord, J. Novak, T. Okusawa, R. Orava, Y. Orlov, K. Osterberg, D. Pantano, V. Pavlicek, D. Pellett, J. Pursley, P. Riipinen, B. Schuyler, S. Seidel, A. Shenai, A. Soha, D. Stuart, R. Tanaka, M. Tavi, H. Von Der Lippe, J. P. Walder, Z. Wang, P. Watje, M. Weber, W. Wester, K. Yamamoto, Y. C. Yang, W. Yao, W. Yao, R. Yarema, J. C. Yun, F. Zetti, T. Zimmerman, S. Zimmermann, S. Zucchellil

Department of Physics and Astronomy Faculty Publications

A new silicon microstrip detector was designed by the CDF collaboration for the proposed high-luminosity operation of the Tevatron p (p) over bar collider (Run IIb). The detector is radiation-tolerant and will still be functional after exposure to particle fluences of 10(14) 1-MeV equivalent neutrons/cm(2) and radiation doses of 20 MRad. The detector will maintain or exceed the performance of the current CDF silicon detector throughout Run IIb. It is based on an innovative silicon "supermodule" design. Critical detector components like the custom radiation-hard SVX4 readout chip, the beryllia hybrids and mini-port (repeater) cards, and the silicon sensors fulfill their …

Go to article

Determination Of The Mechanism For Resonant Scattering In Lamno3, Q. Shen, I. S. Elfimov, P. Fanwick, Y. Tokura, T. Kimura, K. Finkelstein, R. Colella, G. A. Sawatzky Jan 2006

Determination Of The Mechanism For Resonant Scattering In Lamno3, Q. Shen, I. S. Elfimov, P. Fanwick, Y. Tokura, T. Kimura, K. Finkelstein, R. Colella, G. A. Sawatzky

Department of Physics and Astronomy Faculty Publications

The resonant multiple Bragg x-ray diffraction is used to study the forbidden (10 (4) over bar) reflection in LaMnO3. Using the interference between the three-beam scattering and resonant scattering we can determine the phase of the resonant scattering. This phase is shown to be consistent with a model in which the resonant scattering is caused by the influence of the Mn-O bond length distortion rather than directly by the orbital ordering on the Mn 4p band structure.

Go to article

Distinguishing Chaos From Noise By Scale-Dependent Lyapunov Exponent, J. B. Gao, J. Hu, W. W. Tung, Y. H. Cao Jan 2006

Distinguishing Chaos From Noise By Scale-Dependent Lyapunov Exponent, J. B. Gao, J. Hu, W. W. Tung, Y. H. Cao

Department of Physics and Astronomy Faculty Publications

Time series from complex systems with interacting nonlinear and stochastic subsystems and hierarchical regulations are often multiscaled. In devising measures characterizing such complex time series, it is most desirable to incorporate explicitly the concept of scale in the measures. While excellent scale-dependent measures such as epsilon entropy and the finite size Lyapunov exponent (FSLE) have been proposed, simple algorithms have not been developed to reliably compute them from short noisy time series. To promote widespread application of these concepts, we propose an efficient algorithm to compute a variant of the FSLE, the scale-dependent Lyapunov exponent (SDLE). We show that with …

Go to article

Confirmation Of The Y(4260) Resonance Production In Initial State Radiation, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, T. E. Coan, Y. S. Gao, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, P. U. E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, R. E. Mitchell, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, J. Ernst, H. Severini, S. A. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano Jan 2006

Confirmation Of The Y(4260) Resonance Production In Initial State Radiation, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, T. E. Coan, Y. S. Gao, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, P. U. E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, R. E. Mitchell, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, J. Ernst, H. Severini, S. A. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano

Department of Physics and Astronomy Faculty Publications

Using 13.3 fb(-1) of e(+)e(-) collision data taken in the Upsilon(1S-4S) region with the CLEO III detector at the CESR collider, a search has been made for the new resonance Y(4260) recently reported by the BABAR Collaboration. The production of Y(4260) in initial state radiation (ISR), and its decay into pi(+)pi(-)J/psi, are confirmed. A good quality fit to our data is obtained with a single resonance. We determine M(Y(4260))=(4284(-16)(+17)(stat)+/- 4(syst)) MeV/c(2), Gamma(Y(4260))=(73(-25)(+39)(stat)+/- 5(syst)) MeV/c(2), and Gamma(ee)(Y(4260))xB(Y(4260)->pi(+)pi(-)J/psi)=(8.9(-3.1)(+3.9)(stat)+/- 1.8(syst)) eV/c(2).

Go to article

Analysis Of The Pi(+) Pi(-) Pi(+)Pi(-) And Pi(+)Pi(0) Pi(-) Pi(0) Final States In Quasi-Real Two-Photon Collisions At Lep, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, H. Anderhub, V. P. Andreev, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, A. Bajo, G. Baksay, L. Baksay, S. V. Baldew, S. Banerjee, S. Banerjee, A. Barczyk, R. Barillere, P. Bartalini, M. Basile, N. Batalova, R. Battiston, A. Bay, F. Becattini, U. Becker, F. Behner, L. Bellucci, R. Berbeco, J. Berdugo, P. Berges, B. Bertucci, B. L. Betev, M. Biasini, M. Biglietti, A. Biland, J. J. Blaising, S. C. Blyth, G. J. Bobbink, A. Bohm, L. Boldizsar, B. Borgia, S. Bottai, D. Bourilkov, M. Bourquin, S. Braccini, J. G. Branson, F. Brochu, J. D. Burger, W. J. Burger, X. D. Cai, M. Capell, G. C. Romeo, G. Carlino, A. Cartacci, J. Casaus, F. Cavallari, N. Cavallo, C. Cecchi, M. Cerrada, M. Chamizo, Y. Chang, M. Chemarin, A. Chen, G. Chen, G. M. Chen, H. F. Chen, H. S. Chen, G. Chiefari, L. Cifarelli, F. Cindolo, I. Clare, R. Clare, G. Coignet, N. Colino, S. Costantini, B. De La Cruz, S. Cucciarelli, R. De Asmundis, P. Deglon, J. Debreczeni, A. Degre, K. Dehmelt, K. Deiters, D. Della Volpe, E. Delmeire, P. Denes, F. De Notaristefani, A. De Salvo, M. Dierckxsens, C. Dionisi, M. Dittmar, A. Doria, M. T. Dova, D. Duchesneau, M. Duda, B. Echenard, A. Eline, A. El Hage, H. El Mamouni, A. Engler, F. J. Eppling, P. Extermann, M. A. Falagan, S. Falciano, A. Favara, J. Fay, O. Fedin, M. Felcini, T. Ferguson, H. Fesefeldt, E. Fiandrini, J. H. Field, F. Filthaut, P. H. Fisher, W. Fisher, G. Forconi, K. Freudenreich, C. Furetta, Y. Galaktionov, S. N. Ganguli, P. Garcia-Abia, M. Gataullin, S. Gentile, S. Giagu, Z. F. Gong, G. Grenier, O. Grimm, M. W. Gruenewald, M. Guida, V. K. Gupta, A. Gurtu, L. J. Gutay, D. Haas, D. Hatzifotiadou, T. Hebbeker, A. Herve, J. Hirschfelder, H. Hofer, M. Hohlmann, G. Holzner, S. R. Hou, B. N. Jin, P. Jindal, L. W. Jones, P. De Jong, I. Josa-Mutuberria, M. Kaur, M. N. Kienzle-Focacci, J. K. Kim, J. Kirkby, W. Kittel, A. Klimentov, A. C. Konig, M. Kopal, V. Koutsenko, M. Kraber, R. W. Kraemer, A. Kruger, A. Kunin, P. L. De Guevara, I. Laktineh, G. Landi, M. Lebeau, A. Lebedev, P. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, J. M. Le Goff, R. Leiste, M. Levtchenko, P. Levtchenko, C. Li, S. Likhoded, C. H. Lin, W. T. Lin, F. L. Linde, L. Lista, Z. A. Liu, W. Lohmann, E. Longo, Y. S. Lu, C. Luci, L. Luminari, W. Lustermann, W. G. Ma, L. Malgeri, A. Malinin, C. Mana, J. Mans, J. P. Martin, F. Marzano, K. Mazumdar, R. R. Mcneil, S. Mele, L. Merola, M. Meschini, W. J. Metzger, A. Mihul, H. Milcent, G. Mirabelli, J. Mnich, G. B. Mohanty, G. S. Muanza, A. J. M. Muijs, M. Musy, S. Nagy, S. Natale, M. Napolitano, F. Nessi-Tedaldi, S. Nesterov, H. Newman, A. Nisati, T. Novak, H. Nowak, R. Ofierzynski, G. Organtini, I. Pal, C. Palomares, P. Paolucci, R. Paramatti, G. Passaleva, S. Patricelli, T. Paul, M. Pauluzzi, C. Paus, F. Pauss, M. Pedace, S. Pensotti, D. Perret-Gallix, D. Piccolo, F. Pierella, M. Pieri, M. Pioppi, P. A. Piroue, E. Pistolesi, V. Plyaskin, M. Pohl, V. Pojidaev, J. Pothier, D. Prokofiev, G. Rahal-Callot, M. A. Rahaman, P. Raics, N. Raja, R. Ramelli, P. G. Rancoita, R. Ranieri, A. Raspereza, P. Razis, S. Rembeczki, D. Ren, M. Rescigno, S. Reucroft, S. Riemann, K. Riles, B. P. Roe, L. Romero, A. Rosca, C. Rosemann, C. Rosenbleck, S. Rosier-Lees, S. Roth, J. A. Rubio, G. Ruggiero, H. Rykaczewski, A. Sakharov, S. Saremi, S. Sarkar, J. Salicio, E. Sanchez, C. Schafer, H. Schopper, D. J. Schotanus, C. Sciacca, L. Servoli, S. Shevchenko, N. Shivarov, V. Shoutko, E. Shumilov, A. Shvorob, D. Son, C. Souga, P. Spillantini, M. Steuer, D. P. Stickland, B. Stoyanov, A. Straessner, K. Sudhakar, G. Sultanov, L. Z. Sun, S. Sushkov, H. Suter, J. D. Swain, Z. Szillasi, X. W. Tang, P. Tarjan, L. Tauscher, L. Taylor, B. Tellili, D. Teyssier, C. Timmermans, S. C. C. Ting, S. M. Ting, S. C. Tonwar, J. Toth, C. Tully, K. L. Tung, J. Ulbricht, E. Valente, R. T. Van De Walle, R. Vasquez, G. Vesztergombi, I. Vetlitsky, G. Viertel, M. Vivargent, S. Vlachos, I. Vodopianov, H. Vogel, H. Vogt, I. Vorobiev, A. A. Vorobyov, M. Wadhwa, Q. Wang, X. L. Wang, Z. M. Wang, M. Weber, S. Wynhoff, L. Xia, Z. Z. Xu, J. Yamamoto, B. Z. Yang, C. G. Yang, H. J. Yang, M. Yang, S. C. Yeh, A. Zalite, Y. Zalite, Z. P. Zhang, J. Zhao, G. Y. Zhu, R. Y. Zhu, H. L. Zhuang, A. Zichichi, B. Zimmermann, M. Zoller Jan 2006

Analysis Of The Pi(+) Pi(-) Pi(+)Pi(-) And Pi(+)Pi(0) Pi(-) Pi(0) Final States In Quasi-Real Two-Photon Collisions At Lep, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, H. Anderhub, V. P. Andreev, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, A. Bajo, G. Baksay, L. Baksay, S. V. Baldew, S. Banerjee, S. Banerjee, A. Barczyk, R. Barillere, P. Bartalini, M. Basile, N. Batalova, R. Battiston, A. Bay, F. Becattini, U. Becker, F. Behner, L. Bellucci, R. Berbeco, J. Berdugo, P. Berges, B. Bertucci, B. L. Betev, M. Biasini, M. Biglietti, A. Biland, J. J. Blaising, S. C. Blyth, G. J. Bobbink, A. Bohm, L. Boldizsar, B. Borgia, S. Bottai, D. Bourilkov, M. Bourquin, S. Braccini, J. G. Branson, F. Brochu, J. D. Burger, W. J. Burger, X. D. Cai, M. Capell, G. C. Romeo, G. Carlino, A. Cartacci, J. Casaus, F. Cavallari, N. Cavallo, C. Cecchi, M. Cerrada, M. Chamizo, Y. Chang, M. Chemarin, A. Chen, G. Chen, G. M. Chen, H. F. Chen, H. S. Chen, G. Chiefari, L. Cifarelli, F. Cindolo, I. Clare, R. Clare, G. Coignet, N. Colino, S. Costantini, B. De La Cruz, S. Cucciarelli, R. De Asmundis, P. Deglon, J. Debreczeni, A. Degre, K. Dehmelt, K. Deiters, D. Della Volpe, E. Delmeire, P. Denes, F. De Notaristefani, A. De Salvo, M. Dierckxsens, C. Dionisi, M. Dittmar, A. Doria, M. T. Dova, D. Duchesneau, M. Duda, B. Echenard, A. Eline, A. El Hage, H. El Mamouni, A. Engler, F. J. Eppling, P. Extermann, M. A. Falagan, S. Falciano, A. Favara, J. Fay, O. Fedin, M. Felcini, T. Ferguson, H. Fesefeldt, E. Fiandrini, J. H. Field, F. Filthaut, P. H. Fisher, W. Fisher, G. Forconi, K. Freudenreich, C. Furetta, Y. Galaktionov, S. N. Ganguli, P. Garcia-Abia, M. Gataullin, S. Gentile, S. Giagu, Z. F. Gong, G. Grenier, O. Grimm, M. W. Gruenewald, M. Guida, V. K. Gupta, A. Gurtu, L. J. Gutay, D. Haas, D. Hatzifotiadou, T. Hebbeker, A. Herve, J. Hirschfelder, H. Hofer, M. Hohlmann, G. Holzner, S. R. Hou, B. N. Jin, P. Jindal, L. W. Jones, P. De Jong, I. Josa-Mutuberria, M. Kaur, M. N. Kienzle-Focacci, J. K. Kim, J. Kirkby, W. Kittel, A. Klimentov, A. C. Konig, M. Kopal, V. Koutsenko, M. Kraber, R. W. Kraemer, A. Kruger, A. Kunin, P. L. De Guevara, I. Laktineh, G. Landi, M. Lebeau, A. Lebedev, P. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, J. M. Le Goff, R. Leiste, M. Levtchenko, P. Levtchenko, C. Li, S. Likhoded, C. H. Lin, W. T. Lin, F. L. Linde, L. Lista, Z. A. Liu, W. Lohmann, E. Longo, Y. S. Lu, C. Luci, L. Luminari, W. Lustermann, W. G. Ma, L. Malgeri, A. Malinin, C. Mana, J. Mans, J. P. Martin, F. Marzano, K. Mazumdar, R. R. Mcneil, S. Mele, L. Merola, M. Meschini, W. J. Metzger, A. Mihul, H. Milcent, G. Mirabelli, J. Mnich, G. B. Mohanty, G. S. Muanza, A. J. M. Muijs, M. Musy, S. Nagy, S. Natale, M. Napolitano, F. Nessi-Tedaldi, S. Nesterov, H. Newman, A. Nisati, T. Novak, H. Nowak, R. Ofierzynski, G. Organtini, I. Pal, C. Palomares, P. Paolucci, R. Paramatti, G. Passaleva, S. Patricelli, T. Paul, M. Pauluzzi, C. Paus, F. Pauss, M. Pedace, S. Pensotti, D. Perret-Gallix, D. Piccolo, F. Pierella, M. Pieri, M. Pioppi, P. A. Piroue, E. Pistolesi, V. Plyaskin, M. Pohl, V. Pojidaev, J. Pothier, D. Prokofiev, G. Rahal-Callot, M. A. Rahaman, P. Raics, N. Raja, R. Ramelli, P. G. Rancoita, R. Ranieri, A. Raspereza, P. Razis, S. Rembeczki, D. Ren, M. Rescigno, S. Reucroft, S. Riemann, K. Riles, B. P. Roe, L. Romero, A. Rosca, C. Rosemann, C. Rosenbleck, S. Rosier-Lees, S. Roth, J. A. Rubio, G. Ruggiero, H. Rykaczewski, A. Sakharov, S. Saremi, S. Sarkar, J. Salicio, E. Sanchez, C. Schafer, H. Schopper, D. J. Schotanus, C. Sciacca, L. Servoli, S. Shevchenko, N. Shivarov, V. Shoutko, E. Shumilov, A. Shvorob, D. Son, C. Souga, P. Spillantini, M. Steuer, D. P. Stickland, B. Stoyanov, A. Straessner, K. Sudhakar, G. Sultanov, L. Z. Sun, S. Sushkov, H. Suter, J. D. Swain, Z. Szillasi, X. W. Tang, P. Tarjan, L. Tauscher, L. Taylor, B. Tellili, D. Teyssier, C. Timmermans, S. C. C. Ting, S. M. Ting, S. C. Tonwar, J. Toth, C. Tully, K. L. Tung, J. Ulbricht, E. Valente, R. T. Van De Walle, R. Vasquez, G. Vesztergombi, I. Vetlitsky, G. Viertel, M. Vivargent, S. Vlachos, I. Vodopianov, H. Vogel, H. Vogt, I. Vorobiev, A. A. Vorobyov, M. Wadhwa, Q. Wang, X. L. Wang, Z. M. Wang, M. Weber, S. Wynhoff, L. Xia, Z. Z. Xu, J. Yamamoto, B. Z. Yang, C. G. Yang, H. J. Yang, M. Yang, S. C. Yeh, A. Zalite, Y. Zalite, Z. P. Zhang, J. Zhao, G. Y. Zhu, R. Y. Zhu, H. L. Zhuang, A. Zichichi, B. Zimmermann, M. Zoller

Department of Physics and Astronomy Faculty Publications

The reactions gamma gamma -> pi(+)pi(-)pi(+)pi(-) and gamma gamma -> pi(+)pi(0)pi(-)pi(0) are studied with the L3 detector at LEP in a data sample collected at centre-of-mass energies from 161 GeV to 209 GeV with a total integrated luminosity of 698 pb(-1). A spin-parity-helicity analysis of the rho(0)rho(0) and p(+)p(-) systems for two-photon centre-of-mass energies between 1 and 3 GeV shows the dominance of the spin-parity state 2(+) with helicity 2. The contribution of 0(+) and 0(-) spin-parity states is also observed, whereas contributions of 2(-) states and of a state with spin-parity 2(+) and zero helicity are found to be …

Go to article

A Double Junction Model Of Irradiated Silicon Pixel Sensors For Lhc, V. Chiochia, M. Swartz, Y. Allkofer, D. Bortoletto, L. Cremaldi, S. Cucclarelli, A. Dorokhov, C. Hoermann, D. Kim, M. Konecki, D. Kothnski, K. Prokofiev, C. Regenfus, T. Rohe, D. A. Sanders, S. Son, T. Speer Jan 2006

A Double Junction Model Of Irradiated Silicon Pixel Sensors For Lhc, V. Chiochia, M. Swartz, Y. Allkofer, D. Bortoletto, L. Cremaldi, S. Cucclarelli, A. Dorokhov, C. Hoermann, D. Kim, M. Konecki, D. Kothnski, K. Prokofiev, C. Regenfus, T. Rohe, D. A. Sanders, S. Son, T. Speer

Department of Physics and Astronomy Faculty Publications

In this paper, we discuss the measurement of charge collection in irradiated silicon pixel sensors and the comparison with a detailed simulation. The simulation implements a model of radiation damage by including two defect levels with opposite charge states and trapping of charge carriers. The modeling proves that a doubly peaked electric field generated by the two defect levels is necessary to describe the data and excludes a description based on acceptor defects uniformly distributed across the sensor bulk. In addition, the dependence of trap concentrations upon fluence is established by comparing the measured and simulated profiles at several fluences …

Go to article

Dielectron Widths Of The Upsilon(1s,2s,3s) Resonances, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, K. Arms, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, V. Savinov, O. Aquines, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins Jan 2006

Dielectron Widths Of The Upsilon(1s,2s,3s) Resonances, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, K. Arms, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, V. Savinov, O. Aquines, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins

Department of Physics and Astronomy Faculty Publications

We determine the dielectron widths of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) resonances with better than 2% precision by integrating the cross section of e(+)e(-)->Upsilon over the e(+)e(-) center-of-mass energy. Using e(+)e(-) energy scans of the Upsilon resonances at the Cornell Electron Storage Ring and measuring Upsilon production with the CLEO detector, we find dielectron widths of 1.252 +/- 0.004(sigma(stat))+/- 0.019(sigma(syst)) keV, 0.581 +/- 0.004 +/- 0.009 keV, and 0.413 +/- 0.004 +/- 0.006 keV for the Upsilon(1S), Upsilon(2S), and Upsilon(3S), respectively.

Go to article

Gan Nanorod Schottky And P-N Junction Diodes, P. Deb, H. Kim, Y. X. Qin, R. Lahiji, M. Oliver, R. Reifenberger, T. Sands Jan 2006

Gan Nanorod Schottky And P-N Junction Diodes, P. Deb, H. Kim, Y. X. Qin, R. Lahiji, M. Oliver, R. Reifenberger, T. Sands

Department of Physics and Astronomy Faculty Publications

Conductive atomic force microscopy has been used to characterize single GaN nanorod Schottky and p-n junction diodes. The ideality factor, reverse breakdown voltage, and the Schottky barrier height of individual nanorod diodes were compared to those from conventional thin-film diodes. Large-area contacts, enabling diodes with arrays of GaN nanorods in parallel, were also fabricated and their electrical characteristics investigated. The defect-free nature of the GaN nanorods and enhanced tunneling effects due to nanoscale contacts have been invoked to explain the electrical behavior of the nanorod diodes.

Go to article

How The Cow Happened - Al Overhauser, R. Colella, A. W. Overhauser Jan 2006

How The Cow Happened - Al Overhauser, R. Colella, A. W. Overhauser

Department of Physics and Astronomy Faculty Publications

In the course of a casual conversation during a social gathering, in the spring of 1974, we were discussing some recent developments in the area of diffraction from perfect crystals, namely, interferometry in the Angstrom region. I (R.C.) was asked by Al Overhauser whether or not I knew anything about the subject. "Not much" was my answer, "but I can read some papers". Al then proceeded to describe a possible experiment, namely, the effect of gravity on the quantum mechanical phase of the neutron, in essence, what later was called the COW experiment (Colella, Overhauser, Werner).

Go to article

Explorations Of The Magnetization Of Ga1-Xmnxs Over A Wide Range Of Concentrations, 0.008 < X < 0.18, J. L. Tracy, R. Mourad, J. Garner, T. M. Pekarek, I. Miotkowski, A. K. Ramdas Jan 2006

Explorations Of The Magnetization Of Ga1-Xmnxs Over A Wide Range Of Concentrations, 0.008 < X < 0.18, J. L. Tracy, R. Mourad, J. Garner, T. M. Pekarek, I. Miotkowski, A. K. Ramdas

Department of Physics and Astronomy Faculty Publications

Calculations and measurements of the magnetization of Ga1-xMnxS, a III-VI diluted magnetic semiconductor crystal, are reported. Results extend over a wide range of concentrations: x=0.18, 0.13, 0.099, 0.079, 0.062, 0.032, and 0.008. The magnetization was measured at temperatures from 50 to 400 K in magnetic fields up to 7 T. The experimental data are compared with a model of the magnetization that is derived using the energy levels of a singlet Hamiltonian which posits the manganese atoms are not interacting with each other. The Hamiltonian consists of crystal-field, spin-orbit, spin-spin, and Zeeman interactions of the 3d electrons of the Mn+3 …

Go to article

High-Speed Interferometric Detection Of Label-Free Immunoassays On The Biological Compact Disc, M. Zhao, D. Nolte, W. R. Cho, F. Regnier, M. Varma, G. Lawrence, J. Pasqua Jan 2006

High-Speed Interferometric Detection Of Label-Free Immunoassays On The Biological Compact Disc, M. Zhao, D. Nolte, W. R. Cho, F. Regnier, M. Varma, G. Lawrence, J. Pasqua

Department of Physics and Astronomy Faculty Publications

Background: We describe a direct-detection immunoassay that uses high-speed optical interferometry on a biological compact disc (BioCD). Methods: We fabricated phase-contrast BioCDs from 100-mm diameter 1.1-mm thick borosilicate glass disks coated with a 10-layer dielectric stack of Ta2O5/SiO2 that serves as a mirror with a center wavelength at 635 nm. The final layer is a lambda/4 layer of SiO2 onto which protein patterns are immobilized through several different chemical approaches. Protein on the disc is scanned by a focused laser spot as the disc spins. Interaction of the light with the protein provides both a phase-modulated signal and a local …

Go to article

Efficient Algorithm For Random-Bond Ising Models In 2d, Y. L. Loh, E. W. Carlson Jan 2006

Efficient Algorithm For Random-Bond Ising Models In 2d, Y. L. Loh, E. W. Carlson

Department of Physics and Astronomy Faculty Publications

We present an efficient algorithm for calculating the properties of Ising models in two dimensions, directly in the spin basis, without the need for mapping to fermion or dimer models. The algorithm computes the partition function and correlation functions at a single temperature on any planar network of N Ising spins in O(N-3/2) time or less. The method can handle continuous or discrete bond disorder and is especially efficient in the case of bond or site dilution, where it executes in O(NlnN) time near the percolation threshold. We demonstrate its feasibility on the ferromagnetic Ising model and the +/- J …

Go to article

First Prev Next Last