Implementing consistent NLO factorization in single inclusive forward hadron production

Abstract

Single inclusive forward hadron production in high-energy hadron collisions can provide an important test of the Color Glass Condensate picture at small $x$. Recent studies of this process at next-to-leading order have led to problematic results, with cross sections becoming negative at large transverse momenta. We study a new formulation of this quantity proposed recently by Iancu et al. We show that it leads to physical results up to large transverse momenta at fixed coupling. Taking into account running coupling effects in a way that is consistent with existing DIS calculations still poses a challenge.

7 pages, 1 figure. Contribution to DIS2017 proceedings

References in corpus (8)

• Parton distributions for the LHC
• NLO evolution of color dipoles
• Quark contribution to the small-$x$ evolution of color dipole
• Resumming double logarithms in the QCD evolution of color dipoles
• Direct numerical solution of the coordinate space Balitsky-Kovchegov equation at next to leading order
• Single-inclusive particle production in proton-nucleus collisions at next-to-leading order in the hybrid formalism
• CGC factorization for forward particle production in proton-nucleus collisions at next-to-leading order
• Next-to-leading order forward hadron production in the small-$x$ regime: rapidity factorization