Naslov
Aspects of Schwinger-Dyson model description of pseudoscalar mesons at T > 0

Autori
Klabučar, Dubravko ; Horvatić, Davor ; Kekez, Dalibor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
Austrian-Croatian-Hungarian Triangle Meeting, ACHT2017, "Non-Perturbative Methods in Quantum Field Theory" , Workshop in Theoretical Particle Physics

Mjesto i datum
Zalakaros, Mađarska, 20.09.2017. - 22.09.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pseudoscalar mesons ; quark bound state ; Schwinger-Dyson ; nonperturbative ; QCD temperature

Sažetak
Light pseudoscalar mesons are described simultaneously as quark-antiquark bound states and as approximate Goldstone bosons of dynamical chiral symmetry breaking in QCD, thanks to the correct chiral behavior of the consistently truncated set of Schwinger-Dyson equations. As temperature T rises towards the pseudocritical temperature of QCD, the chiral symmetry is restored through the transition of the crossover. In turn, the chiral symmetry restoration drives a partial restoration of the U_A(1) symmetry, signaled by the drop of the eta' mass, but without the unwanted drop of the eta mass if realistically massive quark condensates are used. The transition temperatures in the non-strange and strange quark sectors are synchronized by the coupling to the Polyakov loop.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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