Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-09-06
Eur.Phys.J.C50:585-591,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 4 figures
Scientific paper
10.1140/epjc/s10052-007-0229-3
The next-to-leading order and leading order analysis are performed on the differential cross section ratio from Drell-Yan process. It is found that the effect of next-to-leading order corrections can be negligible on the differential cross section ratios as a function of the quark momentum fraction in the beam proton and the target nuclei for the current Fermilab and future lower beam proton energy. The nuclear Drell-Yan reaction is an ideal tool to study the energy loss of the fast quark moving through cold nuclei. In the leading order analysis, the theoretical results with quark energy loss are in good agreement with the Fermilab E866 experimental data on the Drell-Yan differential cross section ratios as a function of the momentum fraction of the target parton. It is shown that the quark energy loss effect has significant impact on the Drell-Yan differential cross section ratios. The nuclear Drell-Yan experiment at current Fermilab and future lower energy proton beam can not provide us with more information on the nuclear sea quark distribution.
Duan Chun-Gui
Liu Na
Yan Zhan-Yuan
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