Naslov
How, how much, and when are U_A (1) and chiral symmetry restored: T-dependence of axions, η and η'

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

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, pp prezentacija, znanstveni

Skup
ZIMÁNYI SCHOOL’19, Winter Workshop on Heavy Ion Physics

Mjesto i datum
Budimpešta, Mađarska, 02.12.2019. - 06.12.2019

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
QCD topological susceptibility ; temperature dependence ; axion, η' and η meson masses ; axial anomaly ; chiral symmetry restoration
(QCD topological susceptibility ; temperature dependence ; axion, η' and η meson masses, axial anomaly ; chiral symmetry restoration)

Sažetak
We express the QCD topological susceptibility χ(T) through quark condensates calculated in two effective Dyson-Schwinger models of nonperturbative QCD. They exhibit the correct chiral behavior, including the dynamical breaking of chiral symmetry and its restoration at high temperature T. This is reflected in the U_A(1) symmetry breaking and restoration through χ(T), which yields the T-dependence of the U_A(1)-anomaly-influenced masses of η' and η mesons consistent with experiment. This in turn supports our prediction for the T- dependence of the axion mass. Another support is a rather good agreement with the pertinent lattice results.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Mrežna stranica skupa 19th ZIMÁNYI SCHOOL - Winter
Workshop on Heavy Ion Physics:
http://zimanyischool.kfki.hu/19/

POVEZANOST RADA