Phenomenology of isospin-symmetry breaking with vector mesons-Reference-Cited by-同舟云学术

Phenomenology of isospin-symmetry breaking with vector mesons

Published:2024-05-09 Issue:9 Volume:109 Page:
ISSN:2470-0010
Container-title:Physical Review D
language:en
Short-container-title:Phys. Rev. D

Author:

Kovács Péter¹^ORCID,Wolf György¹^ORCID,Weickgenannt Nora²,Rischke Dirk H.³^ORCID

Affiliation:

1. Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, 1121 Budapest, Hungary

2. Institut de Physique Théorique, Université Paris Saclay, CEA, CNRS, F-91191 Gif-sur-Yvette, France and Institute for Theoretical Physics, Goethe University, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, Germany

3. Institute for Theoretical Physics, Goethe University, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, Germany and Helmholtz Research Academy Hesse for FAIR, Campus Riedberg, Max-von-Laue-Strasse 12, D-60438 Frankfurt am Main, Germany

Abstract

We study the effect of isospin-symmetry breaking in the framework of the extended linear σ model in vacuum. In this model, several particles mix with each other at tree level, due to the three nonzero scalar condensates (nonstrange, strange, isospin). We resolve these mixings with the help of various field transformations. We compute all possible meson mixings and decay widths at tree level and perform a χ2 fit to PDG data. A very good fit is found if we exclude the (very small ∼130 keV) ω→ππ decay. We also investigate the violation of Dashen’s theorem.

Published by the American Physical Society

2024

Funder

National Research, Development and Innovation Office

Deutsche Akademie der Naturforscher Leopoldina—Nationale Akademie der Wissenschaften

Wigner Scientific Computational Laboratory

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.096007/fulltext

Reference63 articles.

1. Effective Lagrangians and Field Algebras with Chiral Symmetry

2. Meson vacuum phenomenology in a three-flavor linear sigma model with (axial-)vector mesons

3. Existence of the critical endpoint in the vector meson extended linear sigma model

4. One-loop constituent quark contributions to the vector and axial-vector meson curvature mass

5. Neutron star properties with careful parametrization in the vector and axial-vector meson extended linear sigma model