Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5495440 | Physics Letters B | 2017 | 6 Pages |
Abstract
We perform hybrid Monte Carlo simulation of (2+1+1)-flavors lattice QCD with the optimal domain-wall fermion (which has the effective 4D Dirac operator exactly equal to the Zolotarev optimal rational approximation of the overlap Dirac operator). The gauge ensemble is generated on the 323Ã64 lattice with the extent Ns=16 in the fifth dimension, and with the plaquette gauge action at β=6/g2=6.20. The lattice spacing (aâ0.063fm) is determined by the Wilson flow, using the value t0=0.1416(8)fm obtained by the MILC Collaboration for the (2+1+1)-flavors QCD. The masses of s and c quarks are fixed by the masses of the vector mesons Ï(1020) and J/Ï(3097) respectively; while the mass of the u/d quarks is heavier than their physical values, with the unitary pion mass MÏâ280MeV (and MÏLâ3). We compute the point-to-point quark propagators, and measure the time-correlation functions of meson and baryon interpolators. Our results of the mass spectra of the lowest-lying hadrons containing s and c quarks are in good agreement with the high energy experimental values, together with the predictions of the charmed baryons which have not been observed in experiments.
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