Next-to-leading order forward hadron production in the small-$x$ regime: rapidity factorization

Abstract

Single inclusive hadron production at forward rapidity in high energy p+A collisions is an important probe of the high gluon density regime of QCD and the associated small-$x$ formalism. We revisit an earlier one-loop calculation to illustrate the significance of the "rapidity factorization" approach in this regime. Such factorization separates the very small-$x$ unintegrated gluon density evolution and leads to a new correction term to the physical cross section at one-loop level. Importantly, this rapidity factorization formalism remedies the previous unphysical negative next-to-leading order contribution to the cross section. It is much more stable with respect to "rapidity" variation when compared to the leading-order calculation and provides improved agreement between theory and experiment in the forward rapidity region.

arXiv comment5 pages, 3 figures

References in corpus (21)

• Operator expansion for high-energy scattering
• Quantum Chromodynamics and Other Field Theories on the Light Cone
• Small-x F_2 Structure Function of a Nucleus Including Multiple Pomeron Exchanges
• Saturation Effects in Deep Inelastic Scattering at low $Q^2$ and its Implications on Diffraction
• The Color Glass Condensate
• Evolution of the nuclear modification factors with rapidity and centrality in d+Au collisions at $\sqrt{s_{NN}} = 200 GeV
• The Color Glass Condensate and hadron production in the forward region
• Forward inclusive dijet production and azimuthal correlations in pA collisions
• Factorization for high-energy scattering
• 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
• Single Inclusive Hadron Production at RHIC and the LHC from the Color Glass Condensate
• Improving the kinematics for low-x QCD evolution equations in coordinate space
• Photon impact factor and $k_T$-factorization for DIS in the next-to-leading order
• Towards the Test of Saturation Physics Beyond Leading Logarithm
• Back-to-Back Correlations of Di-hadrons in dAu Collisions at RHIC
• NLO corrections for the dipole factorization of DIS structure functions at low x
• Dihadron momentum imbalance and correlations in d+Au collisions
• Next-to-Leading QCD Factorization for Semi-Inclusive Deep Inelastic Scattering at Twist-4
• Transverse momentum-weighted Sivers asymmetry in semi-inclusive deep inelastic scattering at next-to-leading order

Cited by in corpus (44)

• Next-to-eikonal corrections in the CGC: gluon production and spin asymmetries in pA collisions
• Single-inclusive particle production in proton-nucleus collisions at next-to-leading order in the hybrid formalism
• Dipole factorization for DIS at NLO I: Loop correction to the photon to quark-antiquark light-front wave-functions
• CGC factorization for forward particle production in proton-nucleus collisions at next-to-leading order
• Single inclusive forward hadron production at next-to-leading order
• Paving the Way Towards Precision Physics in Saturation Studies Through Exclusive Diffractive Light Neutral Vector Meson Production
• Implementing the exact kinematical constraint in the saturation formalism
• One-loop corrections to light cone wave functions: the dipole picture DIS cross section
• On the implementation of NLO high energy factorization in single inclusive forward hadron production
• Next-to-next-to-eikonal corrections in the CGC
• Multiple scattering effects on heavy meson production in p+A collisions at backward rapidity
• Deep inelastic scattering in the dipole picture at next-to-leading order
• Quarks at next-to-eikonal accuracy in the CGC I: Forward quark-nucleus scattering
• Massive quarks in NLO dipole factorization for DIS: Transverse photon
• Heavy quarks in proton-nucleus collisions - the hybrid formalism
• Pursuing the Precision Study for Color Glass Condensate in Forward Hadron Productions
• Quark jets scattering from a gluon field: from saturation to high $p_t$
• Rapidity loss, spin and angular asymmetries in scattering of a quark from color field of a proton (nucleus)
• Saturation effects in forward-forward dijet production in p+Pb collisions
• Elastic scattering of a quark from a color field: longitudinal momentum exchange
• Selected topics of quantum computing for nuclear physics
• Single Inclusive Jet Production in $pA$ Collisions at NLO in the small-$x$ regime
• Threshold Resummation for Hadron Production in the Small-$x$ Region
• Transverse momentum broadening in semi-inclusive deep inelastic scattering at next-to-leading order
• Improvement for Color Glass Condensate factorization: single hadron production in pA collisions at next-to-leading order
• Saturation in inclusive production beyond leading logarithm accuracy
• Forward Inclusive Jet Productions in pA Collisions
• Soft photon and two hard jets forward production in proton-nucleus collisions
• Medium-induced gluon radiation in hard forward parton scattering in the saturation formalism
• Fully coherent energy loss effects on light hadron production in pA collisions
• Quenching of light hadron spectra in pA collisions from fully coherent energy loss
• Small-$x$ QCD evolution of $2n$ Wilson line correlator: the weak field limit
• Transverse momentum broadening at NLO and QCD evolution of $\hat{q}$
• Quark TMDs from back-to-back dijet production at forward rapidities in pA collisions beyond eikonal accuracy in the CGC
• Forward Hadron Productions in high energy pp collisions from a Monte-Carlo generator for Color Glass Condensate
• Unequal rapidity correlators in the dilute limit of JIMWLK
• Kaon production in high multiplicity events at the LHC
• Low-$x$ Physics in $pA$ Collisions and at the EIC
• Initial conditions in AA and pA collisions
• Small-x, Diffraction and Vector Mesons
• Forward hadron production in pA collisions beyond leading order
• Single inclusive hadron production in pA collisions at NLO
• Implementing consistent NLO factorization in single inclusive forward hadron production
• Reconstruction of the Dipole Amplitude in the Dipole Picture as a mathematical Inverse Problem