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Physical Sciences and Mathematics Commons™
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- Hadron-Hadron Scattering (12)
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- Aerospace, Physics, and Space Science Faculty Publications (51)
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Articles 61 - 65 of 65
Full-Text Articles in Physical Sciences and Mathematics
Search For Supersymmetry In Pp Collisions At √S = 7 Tev In Events With A Single Lepton, Jets, And Missing Transverse, S. Chatrchyan, Marc M. Baarmand, B. Dorney, Samir Guragain, Marcus Hohlmann, Himali Kalakhety, Robert M. Ralich, Igor Vodopiyanov, The Cms Collaboration
Search For Supersymmetry In Pp Collisions At √S = 7 Tev In Events With A Single Lepton, Jets, And Missing Transverse, S. Chatrchyan, Marc M. Baarmand, B. Dorney, Samir Guragain, Marcus Hohlmann, Himali Kalakhety, Robert M. Ralich, Igor Vodopiyanov, The Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
Results are reported from a search for physics beyond the standard model in proton-proton collisions at a center-of-mass energy of 7 TeV, focusing on the signature with a single, isolated, high-transverse-momentum lepton (electron or muon), energetic jets, and large missing transverse momentum. The data sample comprises an integrated luminosity of 36 pb−1, recorded by the CMS experiment at the LHC. The search is motivated by models of new physics, including supersymmetry. The observed event yields are consistent with standard model backgrounds predicted using control samples obtained from the data. The characteristics of the event sample are consistent with those expected …
Measurement Of Bb̄ Angular Correlations Based On Secondary Vertex Reconstruction At √S = 7 Tev, Vardan Khachatryan, Marc M. Baarmand, B. Dorney, Samir Guragain, Marcus Hohlmann, Himali Kalakhety, Robert M. Ralich, Igor Vodopiyanov, The Cms Collaboration
Measurement Of Bb̄ Angular Correlations Based On Secondary Vertex Reconstruction At √S = 7 Tev, Vardan Khachatryan, Marc M. Baarmand, B. Dorney, Samir Guragain, Marcus Hohlmann, Himali Kalakhety, Robert M. Ralich, Igor Vodopiyanov, The Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
A measurement of the angular correlations between beauty and anti-beauty hadrons (BB¯) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation is reconstructed from the decay vertices and the primary-interaction vertex. The differential BB¯ production cross section, measured from a data sample collected by CMS and corresponding to an integrated luminosity of 3.1 pb−1, shows that a sizable fraction of the …
Generalized Event Shape And Energy Flow Studies In E+E- Annihilation At √S = 91.2-208.0 Gev, Pablo Archard, Gyöngyi Baksay, László A. Baksay, Klaus Dehmelt, Marcus Hohlmann, S. Rembeczki, Zolton Szillási, Igor Vodopiyanov, L3 Collaboration
Generalized Event Shape And Energy Flow Studies In E+E- Annihilation At √S = 91.2-208.0 Gev, Pablo Archard, Gyöngyi Baksay, László A. Baksay, Klaus Dehmelt, Marcus Hohlmann, S. Rembeczki, Zolton Szillási, Igor Vodopiyanov, L3 Collaboration
Aerospace, Physics, and Space Science Faculty Publications
We present results from a study of hadronic event structure in high energy e+e− interactions using the L3 detector at LEP. A new class of event shape distributions are measured at and above the Z boson pole for light quark (u, d, s, c) flavours. Energy flow correlations are studied for all hadronic events. Next-to-leading-log QCD calculations and QCD models with improved leading-log approximations are compared to data and good agreement is found at the Z-pole whereas some discrepancies are observed at higher centre-of-mass energies.
The Structure Of X-Ray Emissions Fromtriggered Lightning Leadersmeasured By A Pinhole-Type X-Ray Camera, M. M. Schaal, J. R. Dwyer, S. Arabshahi, E. S. Cramer, R. J. Lucia, N. Y. Liu, H. K. Rassoul, D. M. Smith, J. W. Matten, A. G. Reid, J. D. Hill, D. M. Jordan, M. A. Uman
The Structure Of X-Ray Emissions Fromtriggered Lightning Leadersmeasured By A Pinhole-Type X-Ray Camera, M. M. Schaal, J. R. Dwyer, S. Arabshahi, E. S. Cramer, R. J. Lucia, N. Y. Liu, H. K. Rassoul, D. M. Smith, J. W. Matten, A. G. Reid, J. D. Hill, D. M. Jordan, M. A. Uman
Aerospace, Physics, and Space Science Faculty Publications
We investigate the structure of X-ray emissions from downward triggered lightning leaders using a pinhole-type X-ray camera (XCAM) located at the International Center for Lightning Research and Testing. This study builds on the work of Dwyer et al. (2011), which reported results from XCAM data from the 2010 summer lightning season. Additional details regarding the 2010 data are reported here. During the 2011 summer lightning season, the XCAM recorded 12 out of 17 leaders, 5 of which show downward leader propagation. Of those five leaders, one dart-stepped leader and two chaotic dart leaders are the focus of this paper. These …
Hydrogenation Of Magnesium Nanoblades: The Effect Of Concentration Dependent Hydrogen Diffusion, Bo Yang, Yuping He, Yiping Zhao
Hydrogenation Of Magnesium Nanoblades: The Effect Of Concentration Dependent Hydrogen Diffusion, Bo Yang, Yuping He, Yiping Zhao
Aerospace, Physics, and Space Science Faculty Publications
By assuming the H diffusion coefficient and H adsorption rate to be exponentially and linearly dependent on concentration, a physical model is developed to predict the hydrogenation process of Mg nanoblades. The predicted H uptake curves agree well with the experimental data from V-coated Mg nanoblades. The obtained H diffusion coefficients in MgHx between Mg and MgH2 have nearly three orders of magnitude variation. The characteristic time of H surface adsorption is longer than that of H diffusion in Mg but shorter than that in MgH2 for 100 nm thick nanoblades. A hydride shell is not formed during the hydrogenation.