Work

Transport coefficients of the heavy quark in the domain of the nonperturbative and noneikonal gluon radiation

Year: 2025

Type: article

Abstract: Drag and diffusion coefficients of the heavy quarks (HQs), such as charm and bottom, are one of the prime tools for discerning the properties of the deconfined quantum chromo-dynamics (QCD) medium created in heavy-ion collision experiments. The innate nonperturbative nature of the QCD medium renders it imperative to estimate the transport coefficients in that domain. The present work evaluates the drag and diffusion coefficients of the moving HQs interacting with the medium particles via two-body collisional and three-body radiative processes to the first order in opacity by employing the Gribov mechanism for the nonperturbative regime. We proffer the latest results of the HQ transport coefficients computed for the nonperturbative and noneikonal gluon radiation off the HQs. The calculations show significant increments of the transport coefficients with the increasing noneikonality by juxtaposing the results with those of the perturbative and eikonal regions. We hope to shed fresh light on explaining the experimental data on the nuclear modification factor R A A and the elliptic flow v 2 of the HQs by advocating for the importance of the noneikonality of the gluon radiation off the HQs.

Source: Physical Review C

DOI: 10.1103/physrevc.111.034905

Authors: Surasree Mazumder, Natasha Sharma, Lokesh Kumar

Institutions: Indian Institute of Science Education and Research Berhampur, Panjab University

Language: English

Topic: High-Energy Particle Collisions Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Indian Institute of Science, Department of Science and Technology, Ministry of Science and Technology, India, Indian Institute of Science Education and Research Mohali, National Institute of Science Education and Research

Awards: G1379339693, G1580901224