English

Influence of Non-extensivity on the drag and diffusion coefficients of hadronic matter

High Energy Physics - Phenomenology 2026-02-10 v2 High Energy Physics - Experiment Nuclear Theory

Abstract

In this work, we investigate the drag and diffusion coefficients of various hadrons propagating through a hadronic thermal bath by employing the Fokker Planck equation within the framework of Tsallis nonextensive statistics. The nonextensive parameter qq accounts for the deviation from equilibrium and provides a more realistic description of the medium that is not perfectly thermalized. The hadronic bath, consisting of various mesonic and baryonic species, is characterized by different mass cutoffs that control the spectral composition of the medium. Our analysis shows that both the drag FF and momentum diffusion coefficients Γ\Gamma increases exponentially with temperature and increases systematically with increasing qq and mass cutoff. The spatial diffusion coefficient DxD_x exhibits a decreasing trend with temperature TT, qq and mass cutoff which highlights the significant influence of nonequilibrium effects and hadronic composition on the transport behaviour of hadrons, offering valuable insights into the thermal and dynamical properties of the hadronic phase preceding freezeout in heavy ion collisions. Additionally, we have studied the relaxation time of heavy mesons such as D0D_0, J/ψJ/\psi and Υ\Upsilon. We found that the heavier mesons relaxed later in comparison to the lighter mesons in the hadronic medium.

Keywords

Cite

@article{arxiv.2602.05478,
  title  = {Influence of Non-extensivity on the drag and diffusion coefficients of hadronic matter},
  author = {Aditya Kumar Singh and Swatantra Kumar Tiwari},
  journal= {arXiv preprint arXiv:2602.05478},
  year   = {2026}
}

Comments

10 pages, 5 figures, submitted for the publication as a regular article