Influence of quark energy loss on extracting nuclear sea quark distribution from nuclear Drell-Yan experimental data

  • By means of two typical kinds of quark energy loss parametrization and the nuclear parton distributions determined only with lepton-nuclear deep inelastic scattering experimental data, a leading order analysis is performed on the proton-induced Drell-Yan differential cross section ratios of tungsten versus deuterium as a function of the quark momentum fraction in the beam proton and target nuclei. It is found that the theoretical results with quark energy loss are in good agreement with the experimental data. The quark energy loss effect produces approximately 3% to 11% suppression on the Drell-Yan differential cross section ratios RW/D in the range 0.05≤x2≤0.3. The application of nuclear Drell-Yan data with heavy targets is remarkably subject to difficulty in the constraint of the nuclear sea quark distribution.

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  • [1] . Aubert J J et al. Phys. Lett. B, 1983, 123: 275-2782. Drell S, Yan T M. Phys. Rev. Lett., 1970, 25: 316-3203. Eskola K J, Kolhinen V J, Salgado C A. Eur. Phys. J. C,1999, 9: 61-68; Eskola K J, Kolhinen V J, Ruuskanen PV. Nucl. Phys. B, 1998, 535: 351-3714. Hirai M, Kumano S, Nagai T H. Phys. Rev. C, 2004, 70:044905-0449155. Hirai M, Kumano S, Miyama M. Phys. Rev. D, 2001, 64:034003-0340186. Adle D M et al. Phys. Rev. Lett., 1990, 64: 2479-24827. Vasiliev M A et al. Phys. Rev. Lett., 1999, 83: 2304-23078. DUAN C G, WANG H M, LI G L. Chin. Phys. Lett., 2002,19: 485-4879. DUAN C G et al. Eur. Phys. J. C, 2003, 29: 557-561,hep-ph/040511310. DUAN C G et al. Eur. Phys. J. C, 2005, 39: 179-184,hep-ph/060118811. DUAN C G et al. HEP NP, 2006, 30: 714-717 (in Chi-nese)12. Brodsky S J, Hoyer P. Phys. Lett. B, 1993, 298: 165-17013. Badier J et al. Nucl. Phys. B, 1997, 484: 265-28214. Asakawa M et al. KEK Report No 2000-1115. Geesaman D et al. Fermilab No.E906. 1999
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DUAN Chun-Gui and LIU Na. Influence of quark energy loss on extracting nuclear sea quark distribution from nuclear Drell-Yan experimental data[J]. Chinese Physics C, 2009, 33(6): 411-414. doi: 10.1088/1674-1137/33/6/002
DUAN Chun-Gui and LIU Na. Influence of quark energy loss on extracting nuclear sea quark distribution from nuclear Drell-Yan experimental data[J]. Chinese Physics C, 2009, 33(6): 411-414.  doi: 10.1088/1674-1137/33/6/002 shu
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Received: 2008-09-26
Revised: 2008-12-24
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Influence of quark energy loss on extracting nuclear sea quark distribution from nuclear Drell-Yan experimental data

    Corresponding author: DUAN Chun-Gui,

Abstract: 

By means of two typical kinds of quark energy loss parametrization and the nuclear parton distributions determined only with lepton-nuclear deep inelastic scattering experimental data, a leading order analysis is performed on the proton-induced Drell-Yan differential cross section ratios of tungsten versus deuterium as a function of the quark momentum fraction in the beam proton and target nuclei. It is found that the theoretical results with quark energy loss are in good agreement with the experimental data. The quark energy loss effect produces approximately 3% to 11% suppression on the Drell-Yan differential cross section ratios RW/D in the range 0.05≤x2≤0.3. The application of nuclear Drell-Yan data with heavy targets is remarkably subject to difficulty in the constraint of the nuclear sea quark distribution.

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