Exotic meson decays in the environment with chiral imbalance
Abstract
An emergence of Local Parity Breaking (LPB) in central heavy-ion collisions (HIC) at high energies is discussed. LPB in the fireball can be produced by a difference between the number densities of right- and left-handed chiral fermions (Chiral Imbalance) which is implemented by a chiral (axial) chemical potential. The effective meson lagrangian induced by QCD is extended to the medium with Chiral Imbalance and the properties of light scalar and pseudoscalar mesons () are analyzed. It is shown that exotic decays of scalar mesons arise as a result of mixing of and vacuum states in the presence of chiral imbalance. The pion electromagnetic formfactor obtains an unusual parity-odd supplement which generates a photon polarization asymmetry in pion polarizability. We hope that the above pointed indications of LPB can be identified in experiments on LHC, RHIC, CBM FAIR and NICA accelerators.
Keywords
Cite
@article{arxiv.1710.01760,
title = {Exotic meson decays in the environment with chiral imbalance},
author = {A. A. Andrianov and V. A. Andrianov and D. Espriu and A. V. Iakubovich and A. E. Putilova},
journal= {arXiv preprint arXiv:1710.01760},
year = {2017}
}
Comments
10 pages, talk given at XXIII International Workshop on High Energy Physics and Quantum Field Theory, Yaroslavl', June 26 - July 3, 2017 and at IV Russian-Spanish Congress: Particle, Nuclear, Astroparticle Physics and Cosmology, JINR Dubna, September 4-8, 2017