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http://hdl.handle.net/2445/178181
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) Chirality 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: https://doi.org/10.3390/particles3010002 |
It is part of: | Particles, 2020, vol. 3, num. 1, p. 15-22 |
URI: | http://hdl.handle.net/2445/178181 |
Related resource: | https://doi.org/10.3390/particles3010002 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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