P-A Drell–Yan Process in the Target Rest Frame**The project supported in part by Major State Basic Development Program (No. G20000774), CAS Knowledge Innovation Project (KJCX2-SW-N02), National Natural Science Foundation of China (19835010, 19673002, 10175074), and the Natural Science Foundation of Hebei Province of China (No. 103143)

Abstract

At high energies, Drell–Yan process can be viewed in the target rest frame as bremsstrahlung of massive photons, rather than parton annihilation. In this paper, the ratio of the p-A Drell–Yan cross section per nucleon for an 800 GeV proton beam incident on Fe, W, and Be targets are calculated by means of the color dipole approach in the target rest system. It is shown that our calculations can quite well fit the Fermilab E866 experimental data with considering the nuclear shadowing effect in p-A Drell–Yan process and without the energy loss effect in it.