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Title: | Chemical potentials and parity breaking: the Nambu-Jona-Lasinio model |
Author: | Andrianov, Alexander A. Espriu, D. (Domènec) Planells Noguera, Xumeu |
Keywords: | Química física Physical and theoretical chemistry |
Issue Date: | Feb-2014 |
Publisher: | Società Italiana di Fisica & Springer Verlag |
Abstract: | We consider the 'two flavour' Nambu-Jona-Lasinio model in the presence of a vector and an axial external chemical potential and study the phase structure of the model at zero temperature. The Nambu-Jona-Lasinio model is often used as a toy replica of QCD and it is therefore interesting to explore the consequences of adding external vector and axial chemical potentials in this model, mostly motivated by claims that such external drivers could trigger a phase where parity could be broken in QCD. We are also motivated by some lattice analysis that attempt to understand the nature of the so-called Aoki phase using this simplified model. Analogies and differences with the expected behaviour in QCD are discussed and the limitations of the model are pointed out. |
Note: | Reproducció del document publicat a: https://doi.org/10.1140/epjc/s10052-014-2776-8 |
It is part of: | European Physical Journal C, 2014, vol. 74, num. 2776 |
URI: | http://hdl.handle.net/2445/119133 |
Related resource: | https://doi.org/10.1140/epjc/s10052-014-2776-8 |
ISSN: | 1434-6044 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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