Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-09-28
Chin. Phys. C (HEP & NP) 33(2009)411-414
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 2 figures
Scientific paper
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 are 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 produce approximately 3% to 11% suppression on the Drell-Yan differential cross section ratios $R_{W/D}$ in the range $0.05\leq x_2\leq0.3$. The application of nuclear Drell-Yan data with heavy targets is remarkably subject to difficulty in the constraints of the nuclear sea-quark distribution.
Chun-Gui Duan
Na Liu
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