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arXiv · 2006.15395

A Dyson-Schwinger model beyond isospin limit prepared for investigating U_A(1)-breaking temperature dependence

Davor Horvatić·Dalibor Kekez·Dubravko Klabučar
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Abstract

Motivated by our earlier findings of sensitive quark-flavor dependence of QCD topological susceptibility on products of current quark masses and corresponding condensates, we allow the breaking of isospin symmetry. For the purpose of future investigations of U_A(1) symmetry breaking and restoration at T > 0, we perform (at T = 0) refitting of the quark-mass parameters of a phenomenologically successful effective model of low-energy QCD. It belongs to the class of separable-interaction models within the Dyson-Schwinger approach to the quark-antiquark substructure of mesons.

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Davor Horvatić, Dalibor Kekez, Dubravko Klabučar. 2020-06-27. A Dyson-Schwinger model beyond isospin limit prepared for investigating U_A(1)-breaking temperature dependence. https://doi.org/10.1140/epjst%2Fe2020-000073-5

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