Nonperturbative heavy quark diffusion coefficients in a weakly magnetized thermal QCD medium
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866918086702006272 |
|---|---|
| author | Dey, Debarshi Bandyopadhyay, Aritra Das, Santosh K. Dash, Sadhana Chandra, Vinod Nandi, Basanta K. |
| author_facet | Dey, Debarshi Bandyopadhyay, Aritra Das, Santosh K. Dash, Sadhana Chandra, Vinod Nandi, Basanta K. |
| contents | In this work, the perturbative and non-perturbative contributions to the heavy quark (HQ) momentum ($κ$) as well as spatial ($D_s$) diffusion coefficients are computed in a weak background magnetic field. The formalism adopted here involves calculation of the in-medium potential of the HQ in a weak magnetic field, which then serves as a proxy for the resummed gluon propagator in the calculation of HQ self-energy ($Σ$). The self-energy determines the scattering rate of HQs with light thermal partons, which is subsequently used to evaluate $κ$ and $D_s$. It is observed that non-perturbative effects play a dominant role at low temperature. The spatial diffusion coefficient $2πT D_s$, exhibits good agreement with recent LQCD results. These findings can be applied to calculate the heavy quark directed flow at RHIC and LHC energies. An extension of this formalism to the case of finite HQ momentum has also been attempted. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_02284 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nonperturbative heavy quark diffusion coefficients in a weakly magnetized thermal QCD medium Dey, Debarshi Bandyopadhyay, Aritra Das, Santosh K. Dash, Sadhana Chandra, Vinod Nandi, Basanta K. High Energy Physics - Phenomenology Nuclear Theory In this work, the perturbative and non-perturbative contributions to the heavy quark (HQ) momentum ($κ$) as well as spatial ($D_s$) diffusion coefficients are computed in a weak background magnetic field. The formalism adopted here involves calculation of the in-medium potential of the HQ in a weak magnetic field, which then serves as a proxy for the resummed gluon propagator in the calculation of HQ self-energy ($Σ$). The self-energy determines the scattering rate of HQs with light thermal partons, which is subsequently used to evaluate $κ$ and $D_s$. It is observed that non-perturbative effects play a dominant role at low temperature. The spatial diffusion coefficient $2πT D_s$, exhibits good agreement with recent LQCD results. These findings can be applied to calculate the heavy quark directed flow at RHIC and LHC energies. An extension of this formalism to the case of finite HQ momentum has also been attempted. |
| title | Nonperturbative heavy quark diffusion coefficients in a weakly magnetized thermal QCD medium |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2504.02284 |