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Article

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Published version

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2016

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cc-by (c) Andrianov, Alexander A. et al., 2016
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/119233

QCD with chiral chemical potential: Models versus lattice

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https://doi.org/10.5506/APhysPolBSupp.9.515

Abstract

An emergence of local spatial parity breaking (LPB) in central heavy-ion collisions (HIC) at high energies is discussed. The QCD phenomenology of LPB in the fireball is induced by a difference between the number densities of right- and left-handed chiral fermions which is triggered by a chiral (axial) chemical potential. For the description of peculiarities of LPB, a number of QCD-inspired models are considered and confronted to certain lattice results. In particular, from the meson effective Lagrangian, it is found that the lightest states may become massless and some scalars turn out to be stable. In experimental studies, the asymmetry in production of longitudinal and transverse polarized states of ρ and ω mesons for different values of the invariant mass can serve as a characteristic indication of local spatial parity breaking which can be derived from an abnormal yield of dilepton pairs in the PHENIX, STAR and ALICE collaborations.

Subject

Col·lisions d'ions pesats, Simetria trencada (Física)

Subject (English)

Heavy ion collision, Broken symmetry (Physics)

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citation

ANDRIANOV, Alexander A., ANDRIANOV, Vladimir A. and ESPRIU, D. (Domènec). QCD with chiral chemical potential: Models versus lattice. Acta Physica Polonica B Proceedings Supplement. 2016. Vol. 9, num. 3, pags. 515-521. ISSN 1899-2358. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/119233

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