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Articles 1  30 of 694
FullText Articles in Physics
Hyperfine Splitting In Muonium: Accuracy Of The Theoretical Prediction, Michael I. Eides
Hyperfine Splitting In Muonium: Accuracy Of The Theoretical Prediction, Michael I. Eides
Physics and Astronomy Faculty Publications
In the last twenty years, the theory of hyperfine splitting in muonium developed without any experimental input. Finally, this situation is changing and a new experiment on measuring hyperfine splitting in muonium is now in progress at JPARC. The goal of the MuSEUM experiment is to improve by an order of magnitude experimental accuracy of the hyperfine splitting and muonelectron mass ratio. Uncertainty of the theoretical prediction for hyperfine splitting will be crucial for comparison between the forthcoming experimental data and the theory in search of a possible new physics. In the current literature estimates of the error bars of ...
Dressed States From Gauge Invariance, Hayato Hirai, Sotaro Sugishita
Dressed States From Gauge Invariance, Hayato Hirai, Sotaro Sugishita
Physics and Astronomy Faculty Publications
The dressed state formalism enables us to define the infrared finite Smatrix for QED. In the formalism, asymptotic charged states are dressed by clouds of photons. The dressed asymptotic states are originally obtained by solving the dynamics of the asymptotic Hamiltonian in the far past or future region. However, there was an argument that the obtained dressed states are not gauge invariant. We resolve the problem by imposing a correct gauge invariant condition. We show that the dressed states can be obtained just by requiring the gauge invariance of asymptotic states. In other words, Gauss’s law naturally leads ...
Dual Superconformal Symmetry Of N = 2 ChernSimons Theory With Fundamental Matter At Large N, Karthik Inbasekar, Sachin Jain, Sucheta Majumdar, Pranjal Nayak, Turmoli Neogi, Ritam Sinha, Tarun Sharma, V. Umesh
Dual Superconformal Symmetry Of N = 2 ChernSimons Theory With Fundamental Matter At Large N, Karthik Inbasekar, Sachin Jain, Sucheta Majumdar, Pranjal Nayak, Turmoli Neogi, Ritam Sinha, Tarun Sharma, V. Umesh
Physics and Astronomy Faculty Publications
Dual conformal symmetry and Yangian symmetry are symmetries of amplitudes that have aided the study of scattering amplitudes in highly supersymmetric theories like N = 4 SYM and ABJM. However, in general such symmetries are absent from the theories with lesser or no supersymmetry. In this paper, we show that the tree level 2 → 2 scattering amplitude in the 3d N = 2 ChernSimons theory coupled to a fundamental chiral multiplet is dual superconformal invariant. In the ’t Hooft large N limit, the 2 → 2 scattering amplitude in this theory has been shown to be treelevel exact in nonanyonic channels, while having ...
Charting The Space Of 3d Cfts With A Continuous Global Symmetry, Anatoly Dymarsky, Joao Penedones, Emilio Trevisani, Alessandro Vichi
Charting The Space Of 3d Cfts With A Continuous Global Symmetry, Anatoly Dymarsky, Joao Penedones, Emilio Trevisani, Alessandro Vichi
Physics and Astronomy Faculty Publications
We study correlation functions of a conserved spin1 current J_{μ} in three dimensional Conformal Field Theories (CFTs). We investigate the constraints imposed by permutation symmetry and current conservation on the form of three point functions ⟨J_{μ}J_{ν}O_{Δ},ℓ⟩ and the four point function ⟨J_{μ}J_{ν}J_{ρ}J_{σ}⟩ and identify the minimal set of independent crossing symmetry conditions. We obtain a recurrence relation for conformal blocks for generic spin1 operators in three dimensions. In the process, we improve several technical points, facilitating the use of recurrence relations. By applying the machinery of ...
Exact Generalized Partition Function Of 2d Cfts At Large Central Charge, Anatoly Dymarsky, Kirill Pavlenko
Exact Generalized Partition Function Of 2d Cfts At Large Central Charge, Anatoly Dymarsky, Kirill Pavlenko
Physics and Astronomy Faculty Publications
We discuss generalized partition function of 2d CFTs on thermal cylinder decorated by higher qKdV charges. We propose that in the large central charge limit qKdV charges factorize such that generalized partition function can be rewritten in terms of auxiliary noninteracting bosons. The explicit expression for the generalized free energy is readily available in terms of the boson spectrum, which can be deduced from the conventional thermal expectation values of qKdV charges. In other words, the picture of the auxiliary noninteracting bosons allows extending thermal onepoint functions to the full nonperturbative generalized partition function. We verify this conjecture for the ...
Intercomparison Of Small Unmanned Aircraft System (Suas) Measurements For Atmospheric Science During The LapseRate Campaign, Lindsay Barbieri, Stephan T. Kral, Sean C. C. Bailey, Amy E. Frazier, Jamey D. Jacob, Joachim Reuder, David Brus, Phillip B. Chilson, Christopher Crick, Carrick Detweiler, Abhiram Doddi, Jack Elston, Hosein Foroutan, Javier GonzálezRocha, Brian R. Greene, Marcelo I. Guzman, Adam L. Houston, Ashraful Islam, Osku Kemppinen, Dale Lawrence, Elizabeth A. PillarLittle, Shane D. Ross, Michael P. Sama, David G. Schmale Iii, Travis J. Schuyler, Ajay Shankar, Suzanne W. Smith, Sean Waugh, Cory Dixon, Steve Borenstein, Gijs De Boer
Intercomparison Of Small Unmanned Aircraft System (Suas) Measurements For Atmospheric Science During The LapseRate Campaign, Lindsay Barbieri, Stephan T. Kral, Sean C. C. Bailey, Amy E. Frazier, Jamey D. Jacob, Joachim Reuder, David Brus, Phillip B. Chilson, Christopher Crick, Carrick Detweiler, Abhiram Doddi, Jack Elston, Hosein Foroutan, Javier GonzálezRocha, Brian R. Greene, Marcelo I. Guzman, Adam L. Houston, Ashraful Islam, Osku Kemppinen, Dale Lawrence, Elizabeth A. PillarLittle, Shane D. Ross, Michael P. Sama, David G. Schmale Iii, Travis J. Schuyler, Ajay Shankar, Suzanne W. Smith, Sean Waugh, Cory Dixon, Steve Borenstein, Gijs De Boer
Chemistry Faculty Publications
Small unmanned aircraft systems (sUAS) are rapidly transforming atmospheric research. With the advancement of the development and application of these systems, improving knowledge of best practices for accurate measurement is critical for achieving scientific goals. We present results from an intercomparison of atmospheric measurement data from the Lower Atmospheric Process Studies at Elevation—a Remotely piloted Aircraft Team Experiment (LAPSERATE) field campaign. We evaluate a total of 38 individual sUAS with 23 unique sensor and platform configurations using a meteorological tower for reference measurements. We assess precision, bias, and time response of sUAS measurements of temperature, humidity, pressure, wind speed ...
Rate Of Cluster Decomposition Via FermatSteiner Point, Alexander Avdoshkin, Lev Astrakhantsev, Anatoly Dymarsky, Michael Smolkin
Rate Of Cluster Decomposition Via FermatSteiner Point, Alexander Avdoshkin, Lev Astrakhantsev, Anatoly Dymarsky, Michael Smolkin
Physics and Astronomy Faculty Publications
In quantum field theory with a mass gap correlation function between two spatially separated operators decays exponentially with the distance. This fundamental result immediately implies an exponential suppression of all higher point correlation functions, but the predicted exponent is not optimal. We argue that in a general quantum field theory the optimal suppression of a threepoint function is determined by total distance from the operator locations to the FermatSteiner point. Similarly, for the higher point functions we conjecture the optimal exponent is determined by the solution of the Euclidean Steiner tree problem. We discuss how our results constrain operator spreading ...
Constraining The Initial Conditions And Temperature Dependent Viscosity With ThreeParticle Correlations In Au+Au Collisions, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, D. Brown, Renee H. Fatemi, Suvarna Ramachandran
Constraining The Initial Conditions And Temperature Dependent Viscosity With ThreeParticle Correlations In Au+Au Collisions, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, D. Brown, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
We present threeparticle mixedharmonic correlations ⟨cos(mф_{α} + nф_{b} – (m + n)ф_{c})⟩ for harmonics m, n = 1 – 3 for charged particles in √s_{NN} = 200 GeV Au+Au collisions at RHIC. These measurements provide information on the threedimensional structure of the initial collision zone and are important for constraining models of a subsequent lowviscosity quark–gluon plasma expansion phase. We investigate correlations between the first, second and third harmonics predicted as a consequence of fluctuations in the initial state. The dependence of the correlations on the pseudorapidity separation between particles show hints of a breaking of longitudinal ...
Processes That Break Baryon Number By Two Units And The Majorana Nature Of The Neutrino, Susan Gardner, Xinshuai Yan
Processes That Break Baryon Number By Two Units And The Majorana Nature Of The Neutrino, Susan Gardner, Xinshuai Yan
Physics and Astronomy Faculty Publications
We employ the simplest possible models of scalarfermion interactions that are consistent with the gauge symmetries of the Standard Model and permit no proton decay to analyze the connections possible among processes that break baryon number by two units.
For the remainder of the abstract, please download this article or visit: https://doi.org/10.1016/j.physletb.2019.01.054
The ProtonΩ Correlation Function In Au + Au Collisions At √S_{Nn} = 200 Gev, J. Adam, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, Renee H. Fatemi, Suvarna Ramachandran
The ProtonΩ Correlation Function In Au + Au Collisions At √SNn = 200 Gev, J. Adam, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
We present the first measurement of the proton–Ω correlation function in heavyion collisions for the central (0–40%) and peripheral (40–80%) Au + Au collisions at √s_{NN }= 200 GeV by the STAR experiment at the Relativistic HeavyIon Collider (RHIC). Predictions for the ratio of peripheral collisions to central collisions for the proton–Ω correlation function are sensitive to the presence of a nucleon–Ω bound state. These predictions are based on the proton–Ω interaction extracted from (2+1)flavor lattice QCD calculations at the physical point. The measured ratio of the proton–Ω correlation function between the ...
Polymer Gels With Tunable Ionic Seebeck Coefficient For UltraSensitive Printed Thermopiles, Dan Zhao, Anna Martinelli, Andreas Willfahrt, Thomas Fischer, Diana Bernin, Zia Ullah Khan, Maryam Shahi, Joseph W. Brill, Magnus P. Jonsson, Simone Fabiano, Xavier Crispin
Polymer Gels With Tunable Ionic Seebeck Coefficient For UltraSensitive Printed Thermopiles, Dan Zhao, Anna Martinelli, Andreas Willfahrt, Thomas Fischer, Diana Bernin, Zia Ullah Khan, Maryam Shahi, Joseph W. Brill, Magnus P. Jonsson, Simone Fabiano, Xavier Crispin
Physics and Astronomy Faculty Publications
Measuring temperature and heat flux is important for regulating any physical, chemical, and biological processes. Traditional thermopiles can provide accurate and stable temperature reading but they are based on brittle inorganic materials with low Seebeck coefficient, and are difficult to manufacture over large areas. Recently, polymer electrolytes have been proposed for thermoelectric applications because of their giant ionic Seebeck coefficient, high flexibility and ease of manufacturing. However, the materials reported to date have positive Seebeck coefficients, hampering the design of ultrasensitive ionic thermopiles. Here we report an “ambipolar” ionic polymer gel with giant negative ionic Seebeck coefficient. The latter can ...
Generalized Gibbs Ensemble Of 2d Cfts At Large Central Charge In The Thermodynamic Limit, Anatoly Dymarsky, Kirill Pavlenko
Generalized Gibbs Ensemble Of 2d Cfts At Large Central Charge In The Thermodynamic Limit, Anatoly Dymarsky, Kirill Pavlenko
Physics and Astronomy Faculty Publications
We discuss partition function of 2d CFTs decorated by higher qKdV charges in the thermodynamic limit when the size of the spatial circle goes to infinity. In this limit the saddle point approximation is exact and at infinite central charge generalized partition function can be calculated explicitly. We show that leading 1/c corrections to free energy can be reformulated as a sum over Young tableaux which we calculate for the first two qKdV charges. Next, we compare generalized ensemble with the “eigenstate ensemble” that consists of a single primary state. At infinite central charge the ensembles match at the ...
Measurement Of DoublePolarization Asymmetries In The QuasiElastic ^{3}He^{→}(E^{→}, E'P) Process, M. Mihovilovic, G. Jin, E. Long, Y. W. Zhang, K. Allada, B. Anderson, J. R. M. Annand, T. Averett, W. Bertozzi, W. Boeglin, P. Bradshaw, A. Camsonne, M. Canan, G. D. Cates, C. Chen, J. P. Chen, E. Chudakov, R. De Leo, X. Deng, A. Deltuva, A. Deur, Chiranjib Dutta, L. El Fassi, D. Flay, S. Frullani, F. Garibaldi, H. Gao, S. Gilad, R. Gilman, O. Glamazdin, Wolfgang Korsch
Measurement Of DoublePolarization Asymmetries In The QuasiElastic 3He→(E→, E'P) Process, M. Mihovilovic, G. Jin, E. Long, Y. W. Zhang, K. Allada, B. Anderson, J. R. M. Annand, T. Averett, W. Bertozzi, W. Boeglin, P. Bradshaw, A. Camsonne, M. Canan, G. D. Cates, C. Chen, J. P. Chen, E. Chudakov, R. De Leo, X. Deng, A. Deltuva, A. Deur, Chiranjib Dutta, L. El Fassi, D. Flay, S. Frullani, F. Garibaldi, H. Gao, S. Gilad, R. Gilman, O. Glamazdin, Wolfgang Korsch
Physics and Astronomy Faculty Publications
We report on a precise measurement of doublepolarization asymmetries in electroninduced breakup of ^{3}He proceeding to pd and ppn final states, performed in quasielastic kinematics at Q^{2} = 0.25(GeV/c)^{2} for missing momenta up to 250MeV/c. These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of ^{3}He and the relative importance of two and threebody effects involved in the breakup reaction dynamics. The measured asymmetries cannot be satisfactorily reproduced by stateoftheart calculations of ^{3}He unless their threebody segment is adjusted, indicating that the spindependent part of the nuclear interaction ...
Decays Of Pentaquarks In Hadrocharmonium And Molecular Scenarios, Michael I. Eides, Victor Yu. Petrov
Decays Of Pentaquarks In Hadrocharmonium And Molecular Scenarios, Michael I. Eides, Victor Yu. Petrov
Physics and Astronomy Faculty Publications
We consider decays of the hidden charm LHCb pentaquarks in the hadrocharmonium and molecular scenarios. In both pictures the LHCb pentaquarks are essentially nonrelativistic bound states. We develop a semirelativistic framework for calculation of the partial decay widths that allows the final particles to be relativistic. Using this approach we calculate the decay widths in the hadrocharmonium and molecular pictures. Molecular hidden charm pentaquarks are constructed as loosely bound states of charmed and anticharmed hadrons. Calculations show that molecular pentaquarks decay predominantly into states with open charm. Strong suppression of the molecular pentaquark decays into states with hidden charm is ...
Improved Measurement Of The Longitudinal Spin Transfer To Λ And Λ¯ Hyperons In Polarized ProtonProton Collisions At √S = 200 Gev, J. Adam, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. D. Brandenburg, Renee H. Fatemi, Suvarna Ramachandran
Improved Measurement Of The Longitudinal Spin Transfer To Λ And Λ¯ Hyperons In Polarized ProtonProton Collisions At √S = 200 Gev, J. Adam, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. D. Brandenburg, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
The longitudinal spin transfer D_{LL} to Λ and Λ¯ hyperons produced in highenergy polarized protonproton collisions is expected to be sensitive to the helicity distribution functions of strange quarks and antiquarks of the proton, and to longitudinally polarized fragmentation functions. We report an improved measurement of D_{LL} from data obtained at a centerofmass energy of √s = 200 GeV with the STAR detector at RHIC. The data have an approximately twelve times larger figure of merit than prior results and cover η < 1.2 in pseudorapidity with transverse momenta p_{T} up to 6 GeV/c. In the forward scattering hemisphere at largest p_{T}, the ...
First Observation Of POdd Γ Asymmetry In Polarized Neutron Capture On Hydrogen, D. Blyth, J. Fry, N. Fomin, R. Alarcon, L. Alonzi, E. Askanazi, S. Baeßler, S. Balascuta, L. BarrónPalos, A. Barzilov, J. D. Bowman, N. Birge, J. R. Calarco, T. E. Chupp, V. Cianciolo, C. E. Coppola, Chrisopher B. Crawford, K. Craycraft, D. Evans, C. Fieseler, E. Frlež, I. Garishvili, M. T. W. Gericke, R. C. Gillis, K. B. Grammer, G. L. Greene, J. Hall, J. Hamblen, C. Hayes, E. B. Iverson, Md Latiful Kabir, Mark Mccrea, R. Milburn, F. Simmons, Aaron P. Sprow, E. Tang
First Observation Of POdd Γ Asymmetry In Polarized Neutron Capture On Hydrogen, D. Blyth, J. Fry, N. Fomin, R. Alarcon, L. Alonzi, E. Askanazi, S. Baeßler, S. Balascuta, L. BarrónPalos, A. Barzilov, J. D. Bowman, N. Birge, J. R. Calarco, T. E. Chupp, V. Cianciolo, C. E. Coppola, Chrisopher B. Crawford, K. Craycraft, D. Evans, C. Fieseler, E. Frlež, I. Garishvili, M. T. W. Gericke, R. C. Gillis, K. B. Grammer, G. L. Greene, J. Hall, J. Hamblen, C. Hayes, E. B. Iverson, Md Latiful Kabir, Mark Mccrea, R. Milburn, F. Simmons, Aaron P. Sprow, E. Tang
Physics and Astronomy Faculty Publications
We report the first observation of the parityviolating gammaray asymmetry A^{np}_{γ} in neutronproton capture using polarized cold neutrons incident on a liquid parahydrogen target at the Spallation Neutron Source at Oak Ridge National Laboratory. A^{np}_{γ} isolates the ΔI = 1, ^{3}S_{1} → ^{3}P_{1} component of the weak nucleonnucleon interaction, which is dominated by pion exchange and can be directly related to a single coupling constant in either the DDH meson exchange model or pionless effective field theory. We measured A^{np}_{γ} = [−3.0 ± 1.4(stat )± 0.2(syst)] × 10^{−8}, which ...
Gluon QuasiPartonDistribution Functions From Lattice Qcd, ZhouYou Fan, YiBo Yang, Adam Anthony, HueyWen Lin, KehFei Liu
Gluon QuasiPartonDistribution Functions From Lattice Qcd, ZhouYou Fan, YiBo Yang, Adam Anthony, HueyWen Lin, KehFei Liu
Physics and Astronomy Faculty Publications
We present the first attempt to access the x dependence of the gluon unpolarized partondistribution function (PDF), based on lattice simulations using the largemomentum effective theory approach. The lattice calculation is carried out with pion masses of 340 and 678 MeV on a (2+1)flavor domainwall fermion configuration with lattice spacing a = 0.111 fm, for the gluon quasiPDF matrix element with the nucleon momentum up to 0.93 GeV. Taking the normalization from similar matrix elements in the rest frame of the nucleon and pion, our results for these matrix elements are consistent with the Fourier transform of ...
Transverse Spin Transfer To Λ And Λ¯ Hyperons In Polarized ProtonProton Collisions At √S = 200 Gev, J. Adam, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. D. Brandenburg, A. V. Brandin, Renee H. Fatemi, Suvarna Ramachandran
Transverse Spin Transfer To Λ And Λ¯ Hyperons In Polarized ProtonProton Collisions At √S = 200 Gev, J. Adam, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. D. Brandenburg, A. V. Brandin, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
The transverse spin transfer from polarized protons to Λ and Λ¯ hyperons is expected to provide sensitivity to the transversity distribution of the nucleon and to the transversely polarized fragmentation functions. We report the first measurement of the transverse spin transfer to Λ and Λ¯ along the polarization direction of the fragmenting quark, D_{TT}, in transversely polarized protonproton collisions at √s = 200 GeV with the STAR detector at RHIC. The data correspond to an integrated luminosity of 18 pb^{−1} and cover the pseudorapidity range η < 1.2 and transverse momenta p_{T} up to 8 GeV/c. The dependence on p_{T} and ...
Proton Mass Decomposition From The Qcd Energy Momentum Tensor, YiBo Yang, Jian Liang, YuJiang Bi, Ying Chen, Terrence Draper, KehFei Liu, Zhaofeng Liu
Proton Mass Decomposition From The Qcd Energy Momentum Tensor, YiBo Yang, Jian Liang, YuJiang Bi, Ying Chen, Terrence Draper, KehFei Liu, Zhaofeng Liu
Physics and Astronomy Faculty Publications
We report results on the proton mass decomposition and also on related quark and glue momentum fractions. The results are based on overlap valence fermions on four ensembles of N_{f} = 2 + 1 domain wall fermion configurations with three lattice spacings and three volumes, and several pion masses including the physical pion mass. With fully nonperturbative renormalization (and universal normalization on both quark and gluon), we find that the quark energy and glue field energy contribute 32(4)(4)% and 36(5)(4)% respectively in the MS¯ (modified minimal substraction) scheme at μ = 2 GeV. A quarter of the trace ...
J/Ψ Production Cross Section And Its Dependence On ChargedParticle Multiplicity In P + P Collisions At √S=200 Gev, J. Adam, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, Renee H. Fatemi, Suvarna Ramachandran
J/Ψ Production Cross Section And Its Dependence On ChargedParticle Multiplicity In P + P Collisions At √S=200 Gev, J. Adam, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
We present a measurement of inclusive J/ψ production at midrapidity (y < 1) in p+p collisions at a centerofmass energy of √s=200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The differential production cross section for J/ψ as a function of transverse momentum (p_{T}) for 0 < p_{T }< 14 GeV/c and the total cross section are reported and compared to calculations from the color evaporation model and the nonrelativistic Quantum Chromodynamics model. The dependence of J/ψ relative yields in three p_{T} intervals on chargedparticle multiplicity at midrapidity is measured for the first time ...
NonAbelian Quasiholes In Lattice MooreRead States And Parent Hamiltonians, Sourav Manna, Julia Wildeboer, Germán Sierra, Anne E. B. Nielsen
NonAbelian Quasiholes In Lattice MooreRead States And Parent Hamiltonians, Sourav Manna, Julia Wildeboer, Germán Sierra, Anne E. B. Nielsen
Physics and Astronomy Faculty Publications
This work concerns Ising quasiholes in MooreRead type lattice wave functions derived from conformal field theory. We commence with constructing MooreRead type lattice states and then add quasiholes to them. By use of Metropolis Monte Carlo simulations, we analyze the features of the quasiholes, such as their size, shape, charge, and braiding properties. The braiding properties, which turn out to be the same as in the continuum MooreRead state, demonstrate the topological attributes of the MooreRead lattice states in a direct way. We also derive parent Hamiltonians for which the states with quasiholes included are ground states. One advantage of ...
BeamTarget Helicity Asymmetry E In K^{0}Λ And K^{0}Σ^{0} Photoproduction On The Neutron, D. H. Ho, R. A. Schumacher, A. D’Angelo, A. Deur, J. Fleming, C. Hanretty, T. Kageya, F. J. Klein, E. Klempt, M. M. Lowry, H. Lu, V. A. Nikonov, P. Peng, A. M. Sandorfi, A. V. Sarantsev, I. I. Strakovsky, N. K. Walford, X. Wei, R. L. Workman, K. P. Adhikari, S. Adhikari, D. Adikaram, Z. Akbar, J. Ball, L. Barion, M. Bashkanov, C. D. Bass, M. Battaglieri, I. Bedlinskiy, A. S. Biselli, Wesley P. Gohn
BeamTarget Helicity Asymmetry E In K0Λ And K0Σ0 Photoproduction On The Neutron, D. H. Ho, R. A. Schumacher, A. D’Angelo, A. Deur, J. Fleming, C. Hanretty, T. Kageya, F. J. Klein, E. Klempt, M. M. Lowry, H. Lu, V. A. Nikonov, P. Peng, A. M. Sandorfi, A. V. Sarantsev, I. I. Strakovsky, N. K. Walford, X. Wei, R. L. Workman, K. P. Adhikari, S. Adhikari, D. Adikaram, Z. Akbar, J. Ball, L. Barion, M. Bashkanov, C. D. Bass, M. Battaglieri, I. Bedlinskiy, A. S. Biselli, Wesley P. Gohn
Physics and Astronomy Faculty Publications
We report the first measurements of the E beamtarget helicity asymmetry for the γ^{→} n^{→} → K^{0}Λ and K^{0}Σ^{0} channels in the energy range 1.70 ≤ W ≤ 2.34 GeV. The CLAS system at Jefferson Lab uses a circularly polarized photon beam and a target consisting of longitudinally polarized solid molecular hydrogen deuteride with low background contamination for the measurements. The multivariate analysis method boosted decision trees is used to isolate the reactions of interest. Comparisons with predictions from the KaonMAID, SAID, and BonnGatchina models are presented. These results will help separate the isospin I = 0 ...
FrequencyDependent Photothermal Measurement Of Thermal Diffusivity For Opaque And NonOpaque Materials: Application To Crystals Of TipsPentacene, Maryam Shahi, Joseph W. Brill
FrequencyDependent Photothermal Measurement Of Thermal Diffusivity For Opaque And NonOpaque Materials: Application To Crystals Of TipsPentacene, Maryam Shahi, Joseph W. Brill
Physics and Astronomy Faculty Publications
We propose the use of a frequencydependent photothermal measurement as a complement to lightflash, i.e., timedependent, measurements to determine the throughplane thermal diffusivity of small, thin samples, e.g., semiconducting polymers and small organic molecule crystals. The analysis is extended from its previous use with some opaque conducting polymers to materials with finite absorption coefficients, such as crystals of 6,13bis(triisopropylsilylethynyl)pentacene. Taking into account the finite absorption coefficients of the latter gives a value of diffusivity, D ≈ 0.10 mm^{2}/s, much smaller than previously estimated and more consistent with its expected value. We also briefly ...
All Tree Level Scattering Amplitudes In ChernSimons Theories With Fundamental Matter, Karthik Inbasekar, Sachin Jain, Pranjal Nayak, V. Umesh
All Tree Level Scattering Amplitudes In ChernSimons Theories With Fundamental Matter, Karthik Inbasekar, Sachin Jain, Pranjal Nayak, V. Umesh
Physics and Astronomy Faculty Publications
We show that BrittoCachazoFengWitten (BCFW) recursion relations can be used to compute all tree level scattering amplitudes in terms of 2 → 2 scattering amplitude in U(N) 𝒩 = 2 ChernSimons (CS) theory coupled to matter in the fundamental representation. As a byproduct, we also obtain a recursion relation for the CS theory coupled to regular fermions, even though in this case standard BCFW deformations do not have a good asymptotic behavior. Moreover, at large N, 2 → 2 scattering can be computed exactly to all orders in ’t Hooft coupling as was done in earlier works by some of the authors ...
Nonperturbatively Renormalized Glue Momentum Fraction At The Physical Pion Mass From Lattice Qcd, YiBo Yang, Ming Gong, Jian Liang, HueyWen Lin, KehFei Liu, Dimitra Pefkou, Phiala Shanahan
Nonperturbatively Renormalized Glue Momentum Fraction At The Physical Pion Mass From Lattice Qcd, YiBo Yang, Ming Gong, Jian Liang, HueyWen Lin, KehFei Liu, Dimitra Pefkou, Phiala Shanahan
Physics and Astronomy Faculty Publications
We present the first nonperturbatively renormalized determination of the glue momentum fraction ⟨x⟩_{g} in the nucleon, based on latticeQCD simulations at the physical pion mass using the clusterdecomposition error reduction technique. We provide the first practical strategy to renormalize the gauge energymomentum tensor nonperturbatively in the regularizationindependent momentumsubtraction (RI/MOM) scheme and convert the results to the MS¯ scheme with oneloop matching. The simulation results show that the clusterdecomposition error reduction technique can reduce the statistical uncertainty of its renormalization constant by a factor of O(300) in calculations using a typical stateoftheart lattice volume, and the nonperturbatively renormalized ...
Collision Energy Dependence Of Moments Of NetKaon Multiplicity Distributions At Rhic, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, Renee H. Fatemi, Suvarna Ramachandran
Collision Energy Dependence Of Moments Of NetKaon Multiplicity Distributions At Rhic, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
Fluctuations of conserved quantities such as baryon number, charge, and strangeness are sensitive to the correlation length of the hot and dense matter created in relativistic heavyion collisions and can be used to search for the QCD critical point. We report the first measurements of the moments of netkaon multiplicity distributions in Au+Au collisions at √s_{NN}=7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV. The collision centrality and energy dependence of the mean (M), variance (σ^{2}), skewness (S), and kurtosis (κ) for netkaon multiplicity distributions as well as the ratio ...
Measurement Of Unpolarized And Polarized Cross Sections For Deeply Virtual Compton Scattering On The Proton At Jefferson Laboratory With Clas, N. Hirlinger Saylor, B. Guegan, V. D. Burkert, L. Elouadrhiri, M. Garçon, F. X. Girod, M. Guidal, H. S. Jo, V. Kubarovsky, S. Niccolai, P. Stoler, K. P. Adhikari, S. Adhikari, Z. Akbar, M. J. Amaryan, S. Anefalos Pereira, J. Ball, I. Balossino, N. A. Baltzell, L. Barion, M. Battaglieri, V. Batourine, I. Bedlinskiy, A. S. Biselli, S. Boiarinov, W. J. Briscoe, W. K. Brooks, S. Bültmann, F. Cao, S. Carman, Wesley P. Gohn
Measurement Of Unpolarized And Polarized Cross Sections For Deeply Virtual Compton Scattering On The Proton At Jefferson Laboratory With Clas, N. Hirlinger Saylor, B. Guegan, V. D. Burkert, L. Elouadrhiri, M. Garçon, F. X. Girod, M. Guidal, H. S. Jo, V. Kubarovsky, S. Niccolai, P. Stoler, K. P. Adhikari, S. Adhikari, Z. Akbar, M. J. Amaryan, S. Anefalos Pereira, J. Ball, I. Balossino, N. A. Baltzell, L. Barion, M. Battaglieri, V. Batourine, I. Bedlinskiy, A. S. Biselli, S. Boiarinov, W. J. Briscoe, W. K. Brooks, S. Bültmann, F. Cao, S. Carman, Wesley P. Gohn
Physics and Astronomy Faculty Publications
This paper reports the measurement of polarized and unpolarized cross sections for the ep → e′ p′ γ reaction, which is composed of deeply virtual Compton scattering (DVCS) and BetheHeitler (BH) processes, at an electron beam energy of 5.88 GeV at the Thomas Jefferson National Accelerator Facility using the Large Acceptance Spectrometer CLAS. The unpolarized cross sections and polarized cross section differences have been measured over broad kinematics, 0.10 < x_{B} < 0.58, 1.0 < Q^{2} < 4.8GeV^{2}, and 0.09 < −t < 2.00GeV^{2}. The results are found to be consistent with previous CLAS data, and these new data are discussed in the framework ...
Quark Spins And Anomalous Ward Identity, Jian Liang, YiBo Yang, Terrence Draper, Ming Gong, KehFei Liu
Quark Spins And Anomalous Ward Identity, Jian Liang, YiBo Yang, Terrence Draper, Ming Gong, KehFei Liu
Physics and Astronomy Faculty Publications
We calculate the intrinsic quark spin contribution to the total proton spin using overlap valence quarks on three ensembles of 2 + 1flavor RBC/UKQCD domainwall configurations with different lattice spacings. The lowest pion mass of the ensembles is around 171 MeV, which is close to the physical point. With overlap fermions and a topological charge derived from the overlap operator, we verify the anomalous Ward identity between nucleon states with momentum transfer. Both the connected and the disconnected insertions of the axialvector current are calculated. For the disconnectedinsertion part, the clusterdecomposition error reduction technique is utilized for the lattice with ...
Harmonic Decomposition Of ThreeParticle Azimuthal Correlations At Energies Available At The Bnl Relativistic Heavy Ion Collider, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, D. Brown, Renee H. Fatemi, Suvarna Ramachandran
Harmonic Decomposition Of ThreeParticle Azimuthal Correlations At Energies Available At The Bnl Relativistic Heavy Ion Collider, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, D. Brown, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
We present measurements of threeparticle correlations for various harmonics in Au+Au collisions at energies ranging from √s_{NN} = 7.7 to 200 GeV using the STAR detector. The quantity ⟨cos(mϕ_{1 }+ nϕ_{2} − (m + n)ϕ_{3})⟩, with ϕ being the azimuthal angles of the particles is evaluated as a function of √s_{NN}, collision centrality, transverse momentum, p_{T}, pseudorapidity difference, Δη, and harmonics (m and n). These data provide detailed information on global event properties such as the threedimensional structure of the initial overlap region, the expansion dynamics of the matter produced in the collisions ...
LowP_{T} E^{+} E^{} Pair Production In Au + Au Collisions At √S_{Nn} = 193 Gev And U + U Collisions At √S_{Nn} = 193 Gev At Star, J. Adam, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, Renee H. Fatemi, Suvarna Ramachandran
LowPT E+ E Pair Production In Au + Au Collisions At √SNn = 193 Gev And U + U Collisions At √SNn = 193 Gev At Star, J. Adam, L. Adamczyk, J. R. Adams, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
We report first measurements of e^{+}e^{−} pair production in the mass region 0.4 < M_{ee} < 2.6 GeV/c^{2} at low transverse momentum (p_{T} < 0.15 GeV/c) in noncentral Au+Au collisions at √s_{NN }= 200 GeV and U+U collisions at √s_{NN} = 193 GeV. Significant enhancement factors, expressed as ratios of data over known hadronic contributions, are observed in the 40%–80% centrality of these collisions. The excess yields peak distinctly at low p_{T} with a width (√⟨p^{2}_{T}⟩) between 40 and 60 MeV/c. The absolute cross section of the excess depends weakly on centrality, while ...