Hyperon polarization in Heavy-Ion Collisions and gravity-related anomaly

Autor:	Baznat, Mircea, Gudima, Konstantin, Sorin, Alexander, Teryaev, Oleg
Rok vydání:	2017
Předmět:	Nuclear Theory High Energy Physics - Lattice High Energy Physics - Phenomenology
Zdroj:	Phys. Rev. C 97, 041902 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevC.97.041902
Popis:	We study the energy dependence of global polarization of $\Lambda$ hyperons in peripheral $Au-Au$ collisions. We combine the calculation of vorticity and strange chemical potential in the framework of kinetic Quark-Gluon String Model with the anomalous mechanism related to axial vortical effect. The earlier found effect of helicity separation implies the quadrupole structure of longitudinal vorticity. We pay special attention to the temperature dependent contribution related to gravitational anomaly and found that the preliminary RHIC data are compatible with its suppression discovered earlier in lattice calculations. The antihyperons polarization is excessing that of hyperons and the difference is more pronounced at smaller energies. Comment: 11 pages, 4 figures; new figures, discussion, references and acknowledgments added
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1701.00923 Zobrazit plný text záznamu View this record from Arxiv