Impact of relativistic corrections to high-pT prompt-psi(2S) production at hadron colliders

Abstract

We study relativistic corrections to prompt psi(2S) production at high pT in hadron colliders. Our calculation employs leading-power factorization with Fragmentation Functions (FFs) computed in nonrelativistic QCD and evolved to next-to-leading-logarithmic accuracy. Relativistic corrections increase the cross section significantly for the gluon channel, but moderately for charm. We perform a full analysis of uncertainties. We observe a good agreement with both ATLAS and CMS cross sections without the need of higher-order color-octet contributions. The polar anisotropy is found to be close to CMS data, partly due to charm fragmentation.

Comments: main manuscript: 7 pages, 4 figures supplementary materials: 11 pages, 4 tables, 13 figures