Critical endpoint and inverse magnetic catalysis for finite temperature and density quark matter in a magnetic background

Article Article scientifique Article Critical endpoint and inverse magnetic catalysis for finite temperature and density quark matter in a magnetic background eng 2014 author Ruggieri M. author Oliva Aleman Leonor 830527 author Castorina P. author Gatto Raffaele Raoul 25347 author Greco V. 255-260 10.1016/j.physletb.2014.05.073 0370-2693 In this article we study chiral symmetry breaking for quark matter in a magnetic background, B , at finite temperature and quark chemical potential, μ , making use of the Ginzburg–Landau effective action formalism. As a microscopic model to compute the effective action we use the renormalized quark–meson model in the chiral limit. Our main goal is to study the evolution of the critical endpoint, , as a function of the magnetic field strength, and investigate the realization of inverse magnetic catalysis at finite chemical potential. We find that the phase transition at zero chemical potential is always of the second order; for small and intermediate values of B , moves towards small μ , while for larger B it moves towards moderately larger values of μ . Our results are in agreement with the inverse magnetic catalysis scenario at finite chemical potential and not too large values of the magnetic field, while at larger B direct magnetic catalysis sets in. Chiral transition with finite magnetic background and chemical potential Ginzburg–Landau effective action Dewey 500.2 Open Access - SCOAP3 34 Département de physique nucléaire et corpusculaire 132 false Physics letters. B 734 084a7a69-ddfe-49d2-a58b-12f559d2e038 Article (Published version) Public main.pdf 690846 application/pdf CC BY openAccess Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Critical endpoint and inverse magnetic catalysis for finite temperature and density quark matter in a magnetic background	Physics letters. B			2014	602	291

Archive ouverte UNIGE

Oliva Aleman, Leonor