Topic: Quark and hadron masses from CLQCD ensembles

Speaker: Prof. Yi-Bo Yang

Coordinates: PCFT C1124, 16:00, Tuesday, May 7

Abstract: I shall present the light-flavor quark masses and hadron spectrum using the 2+1 flavor full-QCD ensembles with stout smeared clover fermion action and Symanzik gauge actions. The simulations are performed on 11 ensembles at 3 lattice spacings a∈[0.05,0.11] fm, 4 spatial sizes L∈[2.5, 5.1] fm, 7 pion masses m_π∈[135,350] MeV, and several values of the strange quark mass. The quark mass is defined through the partially conserved axial current (PCAC) relation and renormalized to MS (2GeV) through the intermediate regularization independent momentum subtraction (RI/MOM) scheme. Eventually, we predict m_u =2.45(22)(20) MeV, m_d =4.74(11)(09) MeV, and m_s =98.8(2.9)(4.7) MeV with the systematic uncertainties from lattice spacing determination, continuum extrapolation and renormalization constant included. The preliminary results of the hadron spectrum will also be presented.