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Type: Artigo
Title: Pi(0) Pole Mass Calculation In A Strong Magnetic Field And Lattice Constraints
Author: Avancini
Sidney S.; Farias
Ricardo L. S.; Pinto
Marcus Benghi; Tavares
William R.; Timoteo
Varese S.
Abstract: The pi(0) neutral meson pole mass is calculated in a strongly magnetized medium using the SU(2) Nambu-Jona-Lasinio model within the random phase approximation (RPA) at zero temperature and zero baryonic density. We employ a magnetic field dependent coupling, G(eB), fitted to reproduce lattice QCD results for the quark condensates. Divergent quantities are handled with a magnetic field independent regularization scheme in order to avoid unphysical oscillations. A comparison between the running and the fixed couplings reveals that the former produces results much closer to the predictions from recent lattice calculations. In particular, we find that the pi(0) meson mass systematically decreases when the magnetic field increases while the scalar mass remains almost constant. We also investigate how the magnetic background influences other mesonic properties such as f pi(0) and g(pi 0qq). (C) 2017 The Authors. Published by Elsevier B.V.
Subject: Neutral Meson Mass
Rpa Approximation
Njl Model In A Strong Magnetic Field
Magnetized Medium
Effective Models Of Qcd
Editor: Elsevier Science BV
Rights: aberto
Identifier DOI: 10.1016/j.physletb.2017.02.002
Date Issue: 2017
Appears in Collections:Unicamp - Artigos e Outros Documentos

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