Chiral medium produced by parallel electric and magnetic fields

¹ College of Physics, University of Chinese Academy of Sciences, Yuquanlu 19A, Beijing 100049, China
² Theoretical Physics Center for Science Facilities, Institute of High Energy Physics, Beijing 100049, China
³ Laboratoire de Mathématiques et Physique Théorique UMR 7350, Université de Tours, 37200, France
⁴ Laboratory of Physics of Living Matter, Far Eastern Federal University, Sukhanova 8, Vladivostok, Russia

^* Speaker. e-mail: marco.ruggieri@ucas.ac.cn
^** e-mail: gxpeng@ucas.ac.cn
^*** e-mail: maxim.chernodub@lmpt.univ-tours.fr

Published online: 25 November 2016

Abstract

We compute (pseudo)critical temperature, T_c, of chiral symmetry restoration for quark matter in the background of parallel electric and magnetic fields. This field configuration leads to the production of a chiral medium on a time scale τ, characterized by a nonvanishing value of the chiral density that equilibrates due to microscopic processes in the thermal bath. We estimate the relaxation time τ to be about ≈ 0:1 − 1 fm/c around the chiral crossover; then we compute the effect of the fields and of the chiral medium on T_c. We find T_c to be lowered by the external fields in the chiral medium.