engleski

T-dependence of the axion mass when the U_A(1) and chiral symmetry breaking are tied

The axion mass can be obtained (up to the constant scale parameter f_a) in terms of the topological susceptibility of QCD. We presently calculate the topological susceptibility in the Schwinger-Dyson approach at the vanishing temperature, T=0, and at nonvanishing temperatures T, reaching T ~ 2.5 T_Ch, i.e., roughly above a couple of the chiral restoration temperatures of QCD.

axion ; strong CP problem of QCD ; topological susceptibility ; restoration of chiral and U_A(1) symmetry at high temperatures

Link/poveznica na program skupa: https://indico.cern.ch/event/775550/timetable/#20 181203.detailed Poveznica na sam rad: https://indico.cern.ch/event/775550/contributions /3234750/attachments/1764985/2866241/KlabucarZima ny2018.pdf