Tuning Fermilab Heavy Quarks in 2+1 Flavor Lattice QCD with Application to Hyperfine Splittings
We report the nonperturbative tuning of parameters - {kappa}{sub c}, {kappa}{sub b}, and {kappa}{sub crit} - that are related to the bare heavy-quark mass in the Fermilab action. This requires the computation of the masses of D{sub s}{sup (*)} and B{sub s}{sup (*)} mesons comprised of a Fermilab heavy quark and a staggered light quark. Additionally, we report the hyperfine splittings for D{sub s}{sup (*)} and B{sub s}{sup (*)} mesons as a cross-check of our simulation and analysis methods. We find a splitting of 145 {+-} 15 MeV for the D{sub s} system and 40 {+-} 9 MeV for the B{sub s} system. These are in good agreement with the Particle Data Group average values of 143.9 {+-} 0.4 MeV and 46.1 {+-} 1.5 MeV, respectively. The calculations are carried out with the MILC 2+1 flavor gauge configurations at three lattice spacings a {approx} 0.15, 0.12, and 0.09 fm.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- DOE - OFFICE OF SCIENCE
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1025492
- Report Number(s):
- BNL-95409-2011-JA; PRVDAQ; KA1401020; TRN: US1104915
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 83, Issue 3; ISSN 1550-7998
- Country of Publication:
- United States
- Language:
- English
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