Mass Spectra of Ds and ? c in Lattice QCD with Nf = 2 + 1 + 1 Domain-Wall Quarks
Journal
EPJ Web of Conferences
Journal Volume
175
Date Issued
2018
Author(s)
Abstract
We perform hybrid Monte Carlo simulation of lattice QCD with N f = 2+1+1 optimal domain-wall quarks on the 32 3 × 64 lattice with lattice spacing a ~ 0:06 fm, and generate a gauge ensemble with physical s and c quarks, and pion mass ~ 280 MeV. Using 2-quark (meson) and 3-quark (baryon) interpolating operators, the mass spectra of the lowest-lying states containing s and c quarks ( D s and Ω c ) are extracted [1], which turn out in good agreement with the high energy experimental values, together with the predictions of the charmed baryons which have not been observed in experiments. For the five new narrow c states observed by the LHCb Collaboration [2], the lowest-lying Ω c (3000) agrees with our predicted mass 3015(29)(34) MeV of the lowest-lying Ω c with J P = 1/2 − . This implies that J P of Ω c (3000) is 1/2 − .
SDGs
Type
conference paper