Energy loss in nuclear Drell-Yan process
Jian-Jun Yang1,2 - Guang-Lie Li2,3
1 Department of Physics, Nanjing Normal University,
Nanjing 210024, China
2 Institute of High Energy Physics, P.O. Box 918(4), Beijing 100039, China
3 CCAST (World Laboratory), B.O. Box 8730, Beijing 100080, China
Received: 11 December 1997 / Published online: 26 March 1998
By means of the nuclear parton distributions, which can be used to provide a good explanation for the EMC effect in the whole x range, we investigate the energy loss effect in the nuclear Drell-Yan (DY) process. When the cross section of lepton pair production is considered to vary with the center-of-mass energy of the nucleon-nucleon collision, we find that the nuclear DY ratio is suppressed because of the energy loss, which balances the overestimate of the DY ratio only when we consider the effect of nuclear parton distributions.