Diffusion of charm and beauty in the Glasma

Abstract

Relativistic nuclear collisions offer a unique way to study strong interactions at very high energy. The collision process can be described within the gluon saturation framework as the interaction of two colored glasses, and because of this interaction strong longitudinal gluon fields, namely the Glasma, are produced immediately after the collision. Besides, heavy quarks are also produced in the very early stage and because of their large mass and small concentration, their motion does not affect the evolution of the Glasma, thus behaving as ideal probes of the Glasma itself. We study the evolution of the heavy quarks in the Glasma allegedly produced in high energy p-Pb collisions by solving consistently the equations of motion of the quarks in the evolving Glasma fields. We find that this motion can be understood in terms of diffusion in momentum space, similarly to the random motion of a heavy probe in a hot thermalized medium. We show how the diffusion of heavy probes affects the nuclear modification factor of D and B mesons in p-Pb collisions.

arXiv commentTalk given by M. R. at QCD@Work2018 held in Matera, Italy, 25-28 June 2018

References in corpus (28)

• Computing Quark and Gluon Distribution Functions for Very Large Nuclei
• Gluon Distribution Functions for Very Large Nuclei at Small Transverse Momentum
• The Color Glass Condensate
• Green's Functions in the Color Field of a Large Nucleus
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• The p_T Spectrum in Heavy-Flavour Hadroproduction
• Theoretical predictions for charm and bottom production at the LHC
• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Some Features of the Glasma
• The p_T Spectrum in Heavy-Flavour Photoproduction
• Directed Flow of Charm Quarks as a Witness of the Initial Strong Magnetic Field in Ultra-Relativistic Heavy Ion Collisions
• Toward a solution to the $R_{AA}$ and $v_2$ puzzle for heavy quarks
• Open Heavy Flavor in QCD Matter and in Nuclear Collisions
• Imprints of fluctuating proton shapes on flow in proton-lead collisions at the LHC
• Eccentric protons? Sensitivity of flow to system size and shape in p+p, p+Pb and Pb+Pb collisions
• Wilson line correlator in the MV model: relating the glasma to deep inelastic scattering
• Revealing proton shape fluctuations with incoherent diffraction at high energy
• Heavy quark pair production in high energy pA collisions: Open heavy flavors
• Heavy Flavor in Medium Momentum Evolution: Langevin vs Boltzmann
• Forward $J/\psi$ production in proton-nucleus collisions at high energy
• CGC predictions for p+A collisions at the LHC and signature of QCD saturation
• Measurement of prompt D-meson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Heavy-flavor production and medium properties in high-energy nuclear collisions - What next?
• Study of prompt D${}^0$ meson production in pPb collisions at $\sqrt{s}$=5 TeV
• Effect of pre-equilibrium phase on $R_{AA}$ and $v_2$ of heavy quarks in heavy ion collisions
• Heavy Quarks in Turbulent QCD Plasmas
• Heavy-flavour production in high-energy d-Au and p-Pb collisions
• Heavy quark diffusion in pre-equilibrium stage of heavy ion collisions

Cited by in corpus (5)

• Impact of Glasma on heavy quark observables in nucleus-nucleus collisions at LHC
• Diffusion of heavy quarks in the early stage of high-energy nuclear collisions at energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider
• Classical model for diffusion and thermalization of heavy quarks in a hot medium: memory and out-of-equilibrium effects
• Probing the Gluon Plasma with Charm Balance Functions
• Elliptic flow of charm quarks produced in the early stage of pA collisions