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Chiral Properties of Strong Interactions in a Magnetic Background

D'Elia, Massimo and Negro, Francesco (2011) Chiral Properties of Strong Interactions in a Magnetic Background. Physical review. D, Particles, fields, gravitation, and cosmology, 83 . p. 114028. ISSN 1550-7998

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We investigate the chiral properties of QCD in presence of a magnetic background field and in the low temperature regime, by lattice numerical simulations of N_f = 2 QCD. We adopt a standard staggered discretization, with a pion mass around 200 MeV, and explore a range of magnetic fields (180 MeV)^2 \leq|e|B \leq (700 MeV)^2, in which we study magnetic catalysis, i.e. the increase of chiral symmetry breaking induced by the background field. We determine the dependence of the chiral condensate on the external field, compare our results with existing model predictions and show that a substantial contribution to magnetic catalysis comes from the modified distribution of non-Abelian gauge fields, induced by the magnetic field via dynamical quark loop effects.

Item Type: Article
Additional Information: Imported from arXiv
Subjects: Area02 - Scienze fisiche > FIS/02 - Fisica teorica, modelli e metodi matematici
Divisions: Dipartimenti (from 2013) > DIPARTIMENTO DI FISICA
Depositing User: dott.ssa Sandra Faita
Date Deposited: 29 Jan 2014 22:06
Last Modified: 29 Jan 2014 22:06
URI: http://eprints.adm.unipi.it/id/eprint/1494

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