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Title: Chiral perturbation theory vs. linear sigma model in a chiral imbalance medium
Author: Andrianov, Alexander A.
Andrianov, Vladimir A.
Espriu, D. (Domènec)
Keywords: Quiralitat
Pertorbació (Dinàmica quàntica)
Perturbation (Quantum dynamics)
Issue Date: 8-Jan-2020
Publisher: MDPI
Abstract: We compare the chiral perturbation theory (ChPT) and the linear sigma model (LSM) as realizations of low energy quantum chromodynamics (QCD) for light mesons in a chirally-imbalanced medium. The relations between the low-energy constants of the chiral Lagrangian and the corresponding constants of the linear sigma model are established as well as the expressions for the decay constant of π -meson in the medium and for the mass of the a0. In the large Nc count taken from QCD the correspondence of ChPT and LSM is remarkably good and provides a solid ground for the search of chiral imbalance manifestations in pion physics. A possible experimental detection of chiral imbalance (and therefore a phase with local parity breaking) is outlined in the charged pion decays inside the fireball.
Note: Reproducció del document publicat a:
It is part of: Particles, 2020, vol. 3, num. 1, p. 15-22
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Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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