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Article

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Accepted version

Publication date

2013-01

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/119168

An effective QCD Lagrangian in the presence of an axial chemical potential

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https://doi.org/10.1140/epjc/s10052-013-2294-0

Abstract

We consider the low energy realization of QCD in terms of mesons when an axial chemical potential is present; a situation that may be relevant in heavy ion collisions. We shall demonstrate that the presence of an axial charge has profound consequences on meson physics. The most notorious effect is the appearance of an explicit source of parity breaking. The eigenstates of strong interactions do not have a definite parity and interactions that would otherwise be forbidden compete with the familiar ones. In this work we focus on scalars and pseudoscalars that are described by a generalized linear sigma model. We comment briefly on the screening role of axial vectors in formation of effective axial charge and on the possible experimental relevance of our results, whose consequences may have been already seen at RHIC.

Subject

Espectrometria de masses, Termodinàmica, Química física

Subject (English)

Mass spectrometry, Thermodynamics, Physical and theoretical chemistry

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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., ESPRIU, D. (Domènec) and PLANELLS NOGUERA, Xumeu. An effective QCD Lagrangian in the presence of an axial chemical potential. European Physical Journal C. 2013. Vol. 73. ISSN 1434-6044. [consulted: 10 of August of 2026]. Available at: https://hdl.handle.net/2445/119168

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