Speaker
Mr
Tomomi Sato
(The Graduate University for Advanced Studies)
Description
Motivated by recent arguments on effective restoration of UA(1) symmetry around the critical temperature in two-flavor QCD, we investigate the renormalization group flow of the U(2)xU(2) linear sigma model (LSM) with the traditional epsilon expansion. Introducing the UA(1) violation, the attractive basin falling into the O(4) LSM in the parameter space and its dependence on the size of UA(1) violation are determined. Employing a mass-dependent renormalization scheme, we also look into how the theory with 8 degrees of freedom (U(2)xU(2) LSM) reduces the one with 4 (O(4) LSM).
Primary author
Mr
Tomomi Sato
(The Graduate University for Advanced Studies)
Co-author
Dr
Norikazu YAMADA
(High Energy Accelerator Research Organization (KEK))
