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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

pi(0) pole mass calculation in a strong magnetic field and lattice constraints

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Autor(es):
Avancini, Sidney S. ; Farias, Ricardo L. S. ; Pinto, Marcus Benghi ; Tavares, William R. ; Timoteo, Varese S.
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: Physics Letters B; v. 767, p. 247-252, APR 10 2017.
Citações Web of Science: 25
Resumo

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. (AU)

Processo FAPESP: 14/04975-9 - Das forças de dois nucleons aos núcleos leves com o grupo de renormalização de similaridade
Beneficiário:Varese Salvador Timoteo
Linha de fomento: Auxílio à Pesquisa - Regular