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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Avancini, Sidney S. ; Farias, Ricardo L. S. ; Pinto, Marcus Benghi ; Tavares, William R. ; Timoteo, Varese S.
Total Authors: 5
Document type: Journal article
Source: Physics Letters B; v. 767, p. 247-252, APR 10 2017.
Web of Science Citations: 24
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. (AU)

FAPESP's process: 14/04975-9 - From two-nucleon forces to light nuclei with the similarity renormalization group
Grantee:Varese Salvador Timoteo
Support type: Regular Research Grants