Measurement of angular distributions of Drell-Yan dimuons in p+d interactions at 800GeV/c

  • L. Y. Zhu
  • , J. C. Peng
  • , P. E. Reimer
  • , T. C. Awes
  • , M. L. Brooks
  • , C. N. Brown
  • , J. D. Bush
  • , T. A. Carey
  • , T. H. Chang
  • , W. E. Cooper
  • , C. A. Gagliardi
  • , G. T. Garvey
  • , D. F. Geesaman
  • , E. A. Hawker
  • , X. C. He
  • , L. D. Isenhower
  • , D. M. Kaplan
  • , S. B. Kaufman
  • , S. A. Klinksiek
  • , D. D. Koetke
  • D. M. Lee, W. M. Lee, M. J. Leitch, N. Makins, P. L. McGaughey, J. M. Moss, B. A. Mueller, P. M. Nord, V. Papavassiliou, B. K. Park, G. Petitt, M. E. Sadler, W. E. Sondheim, P. W. Stankus, T. N. Thompson, R. S. Towell, R. E. Tribble, M. A. Vasiliev, J. C. Webb, J. L. Willis, D. K. Wise, G. R. Young

研究成果: 雜誌貢獻期刊論文同行評審

103 引文 斯高帕斯(Scopus)

摘要

We report a measurement of the angular distributions of Drell-Yan dimuons produced using an 800GeV/c proton beam on a deuterium target. The muon angular distributions in the dilepton rest frame have been measured over the kinematic range 4.5<mμμ<15GeV/c2, 0<pT<4GeV/c, and 0<xF<0.8. No significant cos 2 dependence is found in these proton-induced Drell-Yan data, in contrast with the situation for pion-induced Drell-Yan data. The data are compared with expectations from models which attribute the cos 2 distribution to a QCD vacuum effect or to the presence of the transverse-momentum-dependent Boer-Mulders structure function h1 . Constraints on the magnitude of the sea-quark h1 structure functions are obtained.

原文???core.languages.en_GB???
文章編號082301
期刊Physical Review Letters
99
發行號8
DOIs
出版狀態已出版 - 20 8月 2007

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