Overlap quark propagator near the physical pion mass

Abstract

The Landau-gauge quark propagator is calculated using overlap fermions on 2+1-flavour dynamical fermion gauge fields from the PACS-CS collaboration with pion mass $m_{\pi }\sim 156\text{ MeV}$ and spatial volume $\sim (3\text{ fm}{)}^3.$ The observed features of the mass and renormalisation functions are discussed, including a comparison with recent results using $\mathcal{O}(a)$-improved Wilson fermions on 2-flavour dynamical gauge fields.

Comments: 8 pages, 4 figures