Showing papers by "Harry Cheung published in 1991"
University of Sheffield1, University of Warsaw2, Yale University3, CERN4, University of Liverpool5, Max Planck Society6, University of Oxford7, Laboratoire d'Annecy-le-Vieux de physique des particules8, Lancaster University9, University of Freiburg10, University of Turin11, Uppsala University12, RWTH Aachen University13, University of Mons14
TL;DR: In this paper, the multiplicities of forward produced hadrons in deep inelastic muon scattering on nuclear targets have been compared with those from deuterium, and the ratios are observed to increase towards unity as the virtual photon energy increases with no significant dependence on the other muon kinematic variables.
Abstract: Differential multiplicities of forward produced hadrons in deep inelastic muon scattering on nuclear targets have been compared with those from deuterium. The ratios are observed to increase towards unity as the virtual photon energy increases with no significant dependence on the other muon kinematic variables. The hadron transverse momentum distribution is observed to be broadened in nuclear targets. The dependence on the remaining hadron variables is investigated and the results are discussed in the framework of intranuclear interaction models and in the context of the EMC effect.
85 citations
University of Sheffield1, University of Warsaw2, Yale University3, CERN4, University of Liverpool5, Max Planck Society6, University of Oxford7, Laboratoire d'Annecy-le-Vieux de physique des particules8, Lancaster University9, University of Freiburg10, University of Turin11, Uppsala University12, RWTH Aachen University13, University of Mons14
TL;DR: In this paper, the authors used the EMC forward spectrometer to measure the production of forward charged hadrons in μp and μd scattering at incident beam energies between 100 and 280 GeV.
Abstract: Final data measured with the EMC forward spectrometer are presented on the production of forward charged hadrons in μp and μd scattering at incident beam energies between 100 and 280 GeV. The large statistic of 373 000 events allows a study of the semi-inclusive hadron production as a function ofz,pT2 and 〈pT2〉 in smallQ2,xBj andW bins. Charge multiplicity ratios and differences as a function ofz andxBj are given forp, d andn-targets. From the differences of charge multiplicities the ratio of the valence quark distributions of the protondv(x)/uv(x) is determined for the first time in charged lepton scattering. The Gronau et al. sum rule is tested, the measured sum being 0.31±0.06 stat. ±0.05 syst., compared with the theoretical expectation of 2/7≈0.286. The measured sum corresponds to an absolute value of the ratio of thed andu quark charge of 0.44±0.10 stat.±0.08 syst.
47 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, University of Illinois at Urbana–Champaign5, Indiana University6, Korea University7, Kyungpook National University8, University of Milan9, University of North Carolina at Chapel Hill10, University of Puerto Rico at Mayagüez11, University of South Carolina12, University of Tennessee13, Vanderbilt University14, University of Wisconsin-Madison15
TL;DR: In this paper, the D 0 and D + meson lifetimes were measured using approximately 7500 fully reconstructed D 0 → K − π +, K − ε + π+ π −, D + → ε − δ +, and charge conjugate decays.
15 citations
14 citations