2013/07/15 by Anna M. Stasto, Bo-Wen Xiao, David Zaslavsky · 1 citation
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1103/physrevlett.112.012302
published as Phys. Rev. Lett. 112, 012302 (2014) · 5 pages, 4 figures
arxiv created 2013/07/15 · arxiv updated 2014/01/15
We present results from the first next-to-leading order (NLO) numerical analysis of forward hadron production in pA collisions in the small-x saturation formalism. Using parton distributions and fragmentation functions at NLO, as well as the dipole amplitude from the solution to the Balitsky-Kovchegov equation with running coupling, together with the NLO corrections to the hard coefficients, we obtain a good description of the available RHIC data in dAu collisions. We also comment on the results in the large pT region beyond the saturation scale. Furthermore, we make predictions for forward hadron production in pPb collisions at the LHC. This analysis not only incorporates the important NLO corrections for all partonic channels, but also reduces the renormalization scale dependence and therefore helps to significantly reduce the theoretical uncertainties. It therefore provides a precise test of saturation physics beyond the leading logarithmic approximation.