engleski

Single spin asymmetry in forward pA collisions: Phenomenology at RHIC

We confront the theoretical result of single spin asymmetry A_N in forward pA collisions p↑A → hX including the gluon saturation effect with the recent preliminary experimental data from the PHENIX and STAR Collaborations at the Relativistic Heavy Ion Collider. While we find overall reasonable agreement with the STAR data, our results indicate that the strong nuclear suppression of the asymmetry A_N ∼ A^−1/3 observed by the PHENIX Collaboration cannot be explained within the present understanding of this problem .

Songle spin asymmetry ; Forward pA collisions

nije evidentirano