Improvement for Color Glass Condensate factorization: single hadron production in pA collisions at next-to-leading order

Abstract

High order calculation at semi-hard scale is very important, but a satisfactory calculation framework is still missing. We propose a systematic method to regularize rapidity divergences in the CGC factorization, which makes higher order calculation rigorous and straight forward. By applying this method to single hadron production in pA collision, we find the kinematic constraint effect introduced by hand in previous works comes out automatically, but with different values. The difference is crucial for our next-to-leading order (NLO) result to have a smaller theoretical uncertainty comparing with LO result, which makes high order calculation in CGC factorization to be useful. As a byproduct, the negativity problem found in literature can also be overcome in our framework by a proper choosing of factorization scale.

arXiv comment10 pages, 3 figures, published version

References in corpus (46)

• Parton distributions for the LHC
• Computing Quark and Gluon Distribution Functions for Very Large Nuclei
• Operator expansion for high-energy scattering
• Quantum Chromodynamics and Other Field Theories on the Light Cone
• Gluon Distribution Functions for Very Large Nuclei at Small Transverse Momentum
• Small-x F_2 Structure Function of a Nucleus Including Multiple Pomeron Exchanges
• Nonlinear Gluon Evolution in the Color Glass Condensate: I
• The Color Glass Condensate
• The Wilson renormalization group for low x physics: towards the high density regime
• The BFKL Equation from the Wilson Renormalization Group
• Nonlinear Gluon Evolution in the Color Glass Condensate: II
• The Renormalization Group Equation for the Color Glass Condensate
• QCD Factorization for Semi-Inclusive Deep-Inelastic Scattering at Low Transverse Momentum
• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• Relating different approaches to nonlinear QCD evolution at finite gluon density
• Drell-Yan production at small q_T, transverse parton distributions and the collinear anomaly
• Quark contribution to the small-$x$ evolution of color dipole
• Gluon production in current-nucleus and nucleon-nucleus collisions in a quasi-classical approximation
• Cronin Effect and High-p_T Suppression in pA Collisions
• Triumvirate of Running Couplings in Small-x Evolution
• The Color Glass Condensate and hadron production in the forward region
• The Rapidity Renormalization Group
• Inclusive Gluon Production in DIS at High Parton Density
• High energy pA collisions in the color glass condensate approach II. Quark production
• Global Analysis of Fragmentation Functions for Protons and Charged Hadrons
• High energy pA collisions in the color glass condensate approach I. Gluon production and the Cronin effect
• Single inclusive particle production at high energy from HERA data to proton-nucleus collisions
• Forward Quark Jets from Protons Shattering the Colored Glass
• Inclusive Hadron Productions in pA Collisions
• One-loop Factorization for Inclusive Hadron Production in $pA$ Collisions in the Saturation Formalism
• Energy Dependence of the Cronin Effect from Non-Linear QCD Evolution
• Single Inclusive Hadron Production at RHIC and the LHC from the Color Glass Condensate
• Analytic Regularization in Soft-Collinear Effective Theory
• Model Independent Evolution of Transverse Momentum Dependent Distribution Functions (TMDs) at NNLL
• Heavy quark pair production in high energy pA collisions: Quarkonium
• QCD saturation at the LHC: comparisons of models to p+p and A+A data and predictions for p+Pb collisions
• Single-inclusive particle production in proton-nucleus collisions at next-to-leading order in the hybrid formalism
• Towards the Test of Saturation Physics Beyond Leading Logarithm
• CGC factorization for forward particle production in proton-nucleus collisions at next-to-leading order
• Quark loop contribution to BFKL evolution: Running coupling and leading-N_f NLO intercept
• Single inclusive forward hadron production at next-to-leading order
• Implementing the exact kinematical constraint in the saturation formalism
• Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment
• Cronin effect and high-p_T suppression in the nuclear gluon distribution at small x
• Next-to-leading order forward hadron production in the small-$x$ regime: rapidity factorization
• High energy pA collisions in the Color Glass Condensate approach

Cited by in corpus (14)

• Color Glass Condensate at next-to-leading order meets HERA data
• NLO impact factor for inclusive photon$+$dijet production in $e+A$ DIS at small $x$
• Transverse Parton Distribution and Fragmentation Functions at NNLO: the Gluon Case
• Quarks at next-to-eikonal accuracy in the CGC I: Forward quark-nucleus scattering
• Pursuing the Precision Study for Color Glass Condensate in Forward Hadron Productions
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Threshold Resummation for Hadron Production in the Small-$x$ Region
• Single Inclusive Jet Production in $pA$ Collisions at NLO in the small-$x$ regime
• Next-to-leading order Balitsky-Kovchegov equation beyond large $N_{\mathrm{c}}$
• Saturation and forward jets in proton-lead collisions at the LHC
• Forward Inclusive Jet Productions in pA Collisions
• Energy-Energy Correlator for jet production in $pp$ and $pA$ collisions
• Theory for quarkonium: from NRQCD factorization to soft gluon factorization
• Kaon production in high multiplicity events at the LHC