Impact of Medium Anisotropy on Quarkonium Dissociation and Regeneration

Abstract

Quarkonium production in ultra-relativistic collisions plays a crucial role in probing the existence of hot QCD matter. This study explores quarkonia states dissociation and regeneration in the hot QCD medium while considering momentum anisotropy. The net quarkonia decay width (${\Gamma }_D$) arises from two essential processes: collisional damping and gluonic dissociation. The quarkonia regeneration includes the transition from octet to singlet states within the anisotropic medium. Our study utilizes a medium-modified potential that incorporates anisotropy via particle distribution functions. This modified potential gives rise to collisional damping for quarkonia due to the surrounding medium, as well as the transition of quarkonia from singlet to octet states due to interactions with gluons. Furthermore, we employ the detailed balance approach to investigate the regeneration of quarkonia within this medium. Our comprehensive analysis spans various temperature settings, transverse momentum values, and anisotropic strengths. Notably, we find that, in addition to medium temperatures and heavy quark transverse momentum, anisotropy significantly influences the dissociation and regeneration of various quarkonia states.

11 pages and 4 captioned figures, same as the published version in EPJC

References in corpus (23)

• Static quark-antiquark pairs at finite temperature
• Real and imaginary-time $Q\bar{Q}$ correlators in a thermal medium
• Color Screening and Regeneration of Bottomonia in High-Energy Heavy-Ion Collisions
• The heavy-quark potential in an anisotropic plasma
• High transverse momentum quarkonium production and dissociation in heavy ion collisions
• Pre-equilibrium dilepton production from an anisotropic quark-gluon plasma
• The imaginary part of the static gluon propagator in an anisotropic (viscous) QCD plasma
• Evidence for charmonium generation at the phase boundary in ultra-relativistic nuclear collisions
• Momentum Broadening in an Anisotropic Plasma
• Photon production from an anisotropic quark-gluon plasma
• Thermal imaginary part of a real-time static potential from classical lattice gauge theory simulations
• Jet broadening in unstable non-Abelian plasmas
• Dissociation of quarkonium in hot QCD medium: Modification of the inter-quark potential
• Jet quenching and broadening: the transport coefficient $\hat{q}$ in an anisotropic plasma
• Measuring Quark-Gluon-Plasma Thermalization Time with Dileptons
• Dissociation of heavy quarkonium in hot QCD medium in a quasi-particle model
• Upsilon suppression in PbPb collisions at the LHC
• Regeneration of bottomonia in an open quantum systems approach
• Bottomium suppression in PbPb collisions at LHC energies
• Plasmons in Anisotropic Quark-Gluon Plasma
• Colour screening scenario for quarkonia suppression in a quasiparticle model compared with data obtained from experiments at the CERN SPS, BNL RHIC, and CERN LHC
• Charmonium suppression in ultra-relativistic proton-proton collisions at LHC energies: A hint for QGP in small systems
• Quarkonia dissociation at finite magnetic field in the presence of momentum anisotropy

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• Exploring QGP-like phenomena with Charmonia in $p+p$ collisions at $\sqrt{s}=13$ TeV
• Melting of heavy quarkonia in QGP using deep neural networks
• Quarkonium in a QCD medium with momentum-dependent relaxation time