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Probing quarkonium diffusion in a magnetized quark-gluon plasma

Siddhi Swarupa Jena1,*, Arpan Bhattacharjee1,†, David Dudal2,‡, and Subhash Mahapatra1,§

  • *Contact author: 519ph2015@nitrkl.ac.in
  • †Contact author: arpanarindam@gmail.com
  • ‡Contact author: david.dudal@kuleuven.be
  • §Contact author: mahapatrasub@nitrkl.ac.in
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Phys. Rev. D 112, 086010 – Published 14 October, 2025

DOI: https://doi.org/10.1103/15z1-bxlm

Abstract

Motivated by the potential experimental relevance of magnetically affected heavy-quark diffusion, we consider here a five-dimensional nonlinear Einstein-Born-Infeld-dilaton model to not only holographically model the QCD thermodynamics in a magnetic background but also to probe the charged inner structure of a heavy quarkonium. The dual model’s gravitational equations of motion can be solved in analytical form via the potential reconstruction method. Using a variety of tools—spectral functions, hydrodynamic expansions, or hanging strings—we study the anisotropic diffusion constants and heavy-quark number susceptibility, each time reporting closed form expressions.

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Phys. Rev. D 112, 086010– Published 14 October, 2025
  • Received 15 July 2025
  • Accepted 29 September 2025
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