Strong magnetic fields in a nonlocal Polyakov chiral quark model

D. Gómez Dumm; M.F. Izzo Villafañe; S. Noguera; V.P. Pagura; N.N. Scoccola

doi:10.1051/epjconf/201817202007

Proceedings

Open Access

EPJ Web of Conferences 172, 02007 (2018)
https://doi.org/10.1051/epjconf/201817202007

Strong magnetic fields in a nonlocal Polyakov chiral quark model

D. Gómez Dumm¹^,2^*, M.F. Izzo Villafañe¹^,2, S. Noguera³, V.P. Pagura³ and N.N. Scoccola²^,4^,5

¹ IFLP, CONICET - Departamento de Física, Fac. de Cs. Exactas, Universidad Nacional de La Plata, C.C. 67, (1900) La Plata, Argentina
² CONICET, Rivadavia 1917, (1033) Buenos Aires, Argentina
³ Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, E-46100 Burjassot (Valencia), Spain
⁴ Physics Department, Comisión Nacional de Energía Atómica, Av. Libertador 8250, (1429) Buenos Aires, Argentina
⁵ Universidad Favaloro, Solís 453, (1078) Buenos Aires, Argentina

^* e-mail: dumm@fisica.unlp.edu.ar

Published online: 26 January 2018

Abstract

We study the behavior of strongly interacting matter under an external constant magnetic field in the context of nonlocal chiral quark models that incorporate a coupling to the Polyakov loop. We find that at zero temperature the behavior of the quark condensates shows the expected magnetic catalysis effect, our predictions being in good quantitative agreement with lattice QCD results. On the other hand when the analysis is extended to the case of finite temperature our results show that nonlocal models naturally lead to the Inverse Magnetic Catalysis effect for both the chiral restoration and deconfinement transition temperatures.

© The Authors, published by EDP Sciences, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).