Leptons from heavy-quark semileptonic decay in pA collisions within the CGC framework

Abstract

We study single lepton production from semileptonic decays of heavy flavor hadrons ($D,B\to l$) in pp and p$A$ collisions at RHIC and the LHC within the saturation/Color-Glass-Condensate (CGC) framework. Using the gluon distribution function obtained with the dipole amplitude, whose energy dependence is described by the Balitsky-Kovchegov equation with running coupling effect, we compute the transverse-momentum ($p_{\perp }$) spectra of the lepton yields at mid and forward rapidities. We find that a large fraction of leptons at low $p_{\perp }$ stems from the saturation regime of the incoming gluons in the target, especially in p$A$ collisions at the LHC. The resultant $p_{\perp }$ spectra is slightly harder than the data, but the nuclear modification factor seems consistent with the data within some uncertainty. We also update the nuclear modification factors for J/$\psi$ and $D$ meson at the LHC energy.

19 pages, 11 figures; v2 Figure 5 replaced; v3 Figures 3,4,5,6,7,8,9 replaced; v4 typo in (1) corrected

References in corpus (20)

• The Color Glass Condensate
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Quark contribution to the small-$x$ evolution of color dipole
• Multi-particle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider
• Solving The High Energy Evolution Equation Including Running Coupling Corrections
• Resumming double logarithms in the QCD evolution of color dipoles
• CGC predictions for p+Pb collisions at the LHC
• Collinearly-improved BK evolution meets the HERA data
• Direct numerical solution of the coordinate space Balitsky-Kovchegov equation at next to leading order
• Quark pair production in high energy pA collisions: General features
• 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
• $J/\psi$ production and suppression in high energy proton-nucleus collisions
• Rapidity and transverse-momentum dependence of the inclusive J/$\psi$ nuclear modification factor in p-Pb collisions at $\sqrt{{\text{s}}_{\mathbf{NN}}}=5.02$ TeV
• Production of q bar-q Pairs in Proton-Nucleus Collisions at High Energies
• Measurement of electrons from heavy-flavour hadron decays in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Gluon saturation effects on J/Psi production in heavy ion collisions
• Nonphotonic electrons at RHIC within $k_t$-factorization approach and with experimental semileptonic decay functions
• Heavy flavor production in pA collisions

Cited by in corpus (11)

• Event engineering studies for heavy flavor production and hadronization in high multiplicity hadron-hadron and hadron-nucleus collisions
• Forward $J/\psi$ production at high energy: centrality dependence and mean transverse momentum
• Predictions for $p+$Pb Collisions at $\sqrt{s_{NN}}=5$ TeV: Comparison with Data
• Cross section and transverse single-spin asymmetry of muons from open heavy-flavor decays in polarized $p$+$p$ collisions at $\sqrt{s}=200$ GeV
• $J/\psi$ polarization in high multiplicity $pp$ and $pA$ collisions: CGC+NRQCD approach
• Prospects for quarkonium studies at the high-luminosity LHC
• Production of muons from heavy-flavour hadron decays in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Forward $J/\psi$ and $D$ meson nuclear suppression at the LHC
• Quarkonium production at collider energies in Small-$x$ formalism
• Unified framework for heavy flavor and quarkonium production in high multiplicity p+p and p+A collisions at RHIC and LHC
• Centrality dependence of forward $J/\psi$ suppression in high energy proton-nucleus collisions