On electric fields in hot QCD: perturbation theory

Journal of High Energy Physics

Regular Article - Theoretical Physics

G. Markó¹  G. Endrődi¹ 

[1] Fakultät für Physik, Universität Bielefeld, Universitätsstraße 25, D-33615, Bielefeld, Germany;

关键词: Algorithms and Theoretical Developments;    Finite Temperature or Finite Density;    Lattice QCD;    Thermal Field Theory;   

DOI  :  10.1007/JHEP12(2022)015

 received in 2022-09-06, accepted in 2022-11-23,  发布年份 2022

来源: Springer

【 摘 要 】

We investigate the response of a hot gas of quarks to external electric fields via leading-order perturbation theory. In particular, we discuss how equilibrium is maintained in the presence of the electric field and calculate the electric susceptibility, providing its high-temperature expansion for arbitrary quark mass. Furthermore, we point out that there is a mismatch between this, direct determination of the susceptibility at zero field and the weak-field expansion of the effective action at nonzero electric fields, as obtained using Schwinger’s exact propagator. We discuss the origin of this mismatch and elaborate on the generalization of our results to full QCD in electric fields.

【 授权许可】

Unknown   
© The Author(s) 2022