CGC predictions for p+A collisions at the LHC and signature of QCD saturation

Abstract

We present various predictions for the upcoming p+Pb collisions at \sqrt{S}=5 TeV within the color glass condensate (CGC) formalism, including single inclusive charged hadron production, single inclusive prompt photon production, direct photon production, charged hadron multiplicity distribution and photon-hadron azimuthal correlations. Using the running-coupling Balitsky-Kovchegov evolution equation for calculating various observables, we show that the main source of uncertainties is due to less constrained initial nuclear saturation scale. This gives rise to rather large theoretical uncertainties for nuclear modification factor R_{pA} at the LHC. Nevertheless, we propose a simple scheme in which one can still test the main dynamics of the CGC/saturation in p+A collisions at the LHC.

16 pages, 17 figures; v2: predictions/results unchanged, typos corrected, references added, predictions for charged hadron multiplicity distribution at various centralities in p+Pb collisions at 5.02 TeV added, a note with comparison to the p+Pb data from the ALICE Collaboration added. The version to appear in PLB

References in corpus (19)

• Parton distributions for the LHC
• The Color Glass Condensate
• Universality of Unintegrated Gluon Distributions at small x
• NLO evolution of color dipoles
• Quark contribution to the small-$x$ evolution of color dipole
• Triumvirate of Running Couplings in Small-x Evolution
• Update of Parton Distributions at NNLO
• Solving The High Energy Evolution Equation Including Running Coupling Corrections
• Impact parameter dependent colour glass condensate dipole model
• Single Inclusive Hadron Production at RHIC and the LHC from the Color Glass Condensate
• Forward Neutral Pion Production in p+p and d+Au Collisions at sqrt(s_NN)=200 GeV
• Particle Production at High Energy and Large Transverse Momentum - "The Hybrid Formalism" Revisited
• Gluon saturation and inclusive hadron production at LHC
• Running coupling and power corrections in nonlinear evolution at the high--energy limit
• Prompt photon production and photon-hadron correlations at RHIC and the LHC from the Color Glass Condensate
• Gluon saturation and energy dependence of hadron multiplicity in pp and AA collisions at the LHC
• Hadron multiplicity in pp and AA collisions at LHC from the Color Glass Condensate
• Running Coupling Corrections to High Energy Inclusive Gluon Production
• Direct photons at forward rapidities in high-energy pp collisions

Cited by in corpus (34)

• Analysis of combined HERA data in the Impact-Parameter dependent Saturation model
• Mining for Gluon Saturation at Colliders
• Direct numerical solution of the coordinate space Balitsky-Kovchegov equation at next to leading order
• Forward $J/\psi$ production in proton-nucleus collisions at high energy
• Measurement of prompt D-meson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• CGC factorization for forward particle production in proton-nucleus collisions at next-to-leading order
• Transverse momentum dependence of inclusive primary charged-particle production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• ${\mathrm{\Lambda }}_{\mathrm{c}}^{+}$ production in pp and in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Probing the small-$x$ nuclear gluon distributions with isolated photons at forward rapidities in p+Pb collisions at the LHC
• Ballistic diffusion of heavy quarks in the early stage of relativistic heavy ion collisions at RHIC and LHC
• Inclusive prompt photon-jet correlations as a probe of gluon saturation in electron-nucleus scattering at small $x$
• Impact of fully coherent energy loss on heavy meson production in pA collisions
• CGC/saturation approach: a new impact-parameter dependent model in the next-to-leading order of perturbative QCD
• Testing the Gaussian Approximation to the JIMWLK Equation
• Diphoton production in high-energy p+A collisions
• Nuclear modification factor of neutral pions in the forward and backward regions in $p$-Pb collisions
• Dielectron production in proton-proton and proton-lead collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Quenching of light hadron spectra in pA collisions from fully coherent energy loss
• Azimuthal correlations of heavy-flavor hadron decay electrons with charged particles in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• A CGC/saturation approach for angular correlations in proton-proton scattering
• Measurement of prompt $D^{+}$ and $D_s^{+}$ production in $p\mathrm{Pb}$ collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$TeV
• $D$-meson production in high energy $pA$ collisions within the QCD color dipole transverse momentum representation
• Non-linear evolution in the re-summed next-to-leading order of perturbative QCD:\confronting the experimental data
• Multiplicity-dependent saturation momentum in $p$-Pb collisions at 5.02 TeV
• CGC and saturation approach: Impact-parameter dependent model of perturbative QCD and combined HERA data
• Soft Pomeron in the Colour Glass Condensate approach
• Inclusive and multiplicity dependent production of electrons from heavy-flavour hadron decays in pp and p$-$Pb collisions
• Nuclear transverse momentum imbalance in the color dipole approach at the LHC regime
• Recent Findings from Heavy-Flavor Angular Correlation Measurements in Hadronic Collisions
• Relativistic diffusion model for hadron production in p-Pb collisions at the LHC
• b-CGC versus IP-Sat and high precision combined HERA data
• Single inclusive hadron production in pA collisions at NLO
• Forward hadron production in pA collisions beyond leading order
• Diffractive vector meson production in ultraperipheral heavy ion collisions from the Color Glass Condensate