Speaker
Kohei Fujikura
(YITP)
Description
We investigate the QCD phase diagram with a flavor universal axial chemical potential induced by a rolling inflaton coupled to fermions in the de Sitter spacetime. We clarify the (first-order) critical line and its critical point as a function of Hubble parameter and axial chemical potential, by employing an effective description of chiral symmetry breaking within the framework of the Nambu–Jona-Lasinio model. A first-order chiral phase transition takes place during or at the end of the inflation when the axial chemical potential is large enough and crosses the critical line. Some phenomenological implications are also discussed.
Authors
Kohei Fujikura
(YITP)
Toshifumi Noumi
(The University of Tokyo)