Authors
Abstract
We determine the topological susceptibility of the gauge configurations generated by lattice simulations using two flavors of optimal domain-wall fermion on the 16×32 lattice with length 16 in the fifth dimension, at the lattice spacing a≃0.1 fm. Using the adaptive thick-restart Lanczos algorithm, we project the low-lying eigenmodes of the overlap Dirac operator, and obtain the topological charge of each configuration, for eight ensembles with pion masses in the range 220-550 MeV. From the topological charge, we compute the topological susceptibility and the second normalized cumulant. Our result of the topological susceptibility agrees with the sea-quark mass dependence predicted by the chiral perturbation theory and provides a determination of the chiral condensate, Σ(2 GeV)=[259, and the pion decay constant Fπ=92(12)(2) MeV.Details
| Publication | Physics Letters B, Volume 702, Issue 2-3, p. 131-134. |
| Publication Date | August 2011 |
| DOI | |
| arXiv | arXiv:1105.4414 |
| Bibcode | 2011PhLB..702..131C |
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| E-Print Comment(s) | 10 pages, 3 EPS figures, v2: typos corrected, to appear in Phys. Lett. B; Phys. Lett. B 702 (2011) 131; doi:10.1016/j.physletb.2011.06.070 |