EPJ Web of Conferences 191, 05014 (2018)
https://doi.org/10.1051/epjconf/201819105014

Exotic meson decays and polarization asymmetry in hadron environment with chiral imbalance

¹ Faculty of Physics, Saint Petersburg State University, Universitetskaya nab. 7/9, Saint Petersburg 199034, Russia, and
² Departament de Física Quàntica i Astrofísica and Institut de Ciéncies del Cosmos (ICCUB),Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, Spain

^* e-mail: alput@gmail.com
^** e-mail: a.iakubovich@gmail.com
^*** e-mail: andrianov@icc.ub.edu
^**** e-mail: v.andriano@rambler.ru
^† e-mail: espriu@icc.ub.edu

Published online: 31 October 2018

Abstract

The possibility of the formation of a local parity breaking in a quark-hadron medium is described as a result of a violation of chiral symmetry, i.e, the difference between the average numbers of right and left -handing quarks in the fireball after HIC.The phenomenology of LPB in the fireball induces the introduction of a topological charge and, accordingly, a topological (chiral) chemical potential. Using the effective meson Lagrangian motivated by QCD in the chiral medium the properties of light scalar and pseudoscalar mesons are analyzed. It is establish that exotic decays of scalar mesons arise as a result of mixing of π and a₀ vacuum states in the presence of chiral imbalance. The pion electromagnetic formfactor obtains a parity-odd supplement which generates a photon polarization asymmetry in pion polarizability. We consider that the above-mentioned properties of LPB can be revealed in experiments on LHC, RHIC, CBM FAIR and NICA accelerators.