Place : R517, New Physics Building, NTU
Abstract:
Axion is a prominent candidate for dark matter, arising from the Peccei-Quinn mechanism as the most attractive solution to the strong CP problem. The computation of axion mass relies on the crucial input of topological susceptibility in finite temperature QCD, which requires nonperturbative determination for the range of temperatures: 150 MeV < T < 550 MeV. In this talk, I outline an ongoing project featuring the state-of-the-art simulation of lattice QCD with (u/d, s, c) domain-wall quarks at the physical point, and present preliminary results of the topological susceptibility, and discuss the implication to axion cosmology.