Topological susceptibility in 2+1-flavor QCD with chiral fermions

Sinya Aoki; Guido Cossu; Hidenori Fukaya; Shoji Hashimoto; Takashi Kaneko

doi:10.1051/epjconf/201817504008

paper

Topological susceptibility in 2+1-flavor QCD with chiral fermions

arXiv:1712.05541 · doi:10.1051/epjconf/201817504008

Abstract

We compute the topological susceptibility $χ_{t}$ of 2+1-flavor lattice QCD with dynamical Möbius domain-wall fermions, whose residual mass is kept at 1 MeV or smaller. In our analysis, we focus on the fluctuation of the topological charge density in a "slab" sub-volume of the simulated lattice, as proposed by Bietenholz et al. The quark mass dependence of our results agrees well with the prediction of the chiral perturbation theory, from which the chiral condensate is extracted. Combining the results for the pion mass $M_{π}$ and decay constant $F_{π}$ , we obtain $χ_{t}$ = 0.227(02)(11) $M_{π}^{2} F_{π}^{2}$ at the physical point, where the first error is statistical and the second is systematic.

8 pages, 3 figures, talk given at the 35th International Symposium on Lattice Field Theory, 18-24 June 2017, Granada, Spain

Topological susceptibility in 2+1-flavor QCD with chiral fermions

Abstract

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