Physics and Astronomy
Journal or Book Title
Physical Review C
We report on J/psi production from asymmetric Cu + Au heavy-ion collisions at root S-NN = 200 GeV at the Relativistic Heavy Ion Collider at both forward (Cu-going direction) and backward (Au-going direction) rapidities. The nuclear modification of J/psi yields in Cu + Au collisions in the Au-going direction is found to be comparable to that in Au + Au collisions when plotted as a function of the number of participating nucleons. In the Cu-going direction, J/psi production shows a stronger suppression. This difference is comparable in magnitude and has the same sign as the difference expected from shadowing effects due to stronger low-x gluon suppression in the larger Au nucleus.
American Physical Society
Adare, Andrew; Apadula, Nicole J.; Campbell, Sarah C.; Ding, Lei; Hill, John C.; Lajoie, John G.; Lebedev, Alexandre; Ogilvie, Craig; Patel, Milap R.; Perry, Joshua; Rosati, Marzia; Shaver, Alex; Shimomura, M.; Timilsina, Arbin; Whitaker, Shawn; et al.; and PHENIX Collaboration, "Nuclear matter effects on J/psi production in asymmetric Cu plus Au collisions at root S-NN=200 GeV" (2014). Physics and Astronomy Publications. 242.