Tuning Fermilab heavy quarks in 2+1 flavor lattice QCD with application to hyperfine splittings

Bernard, C. et al. (2011) Tuning Fermilab heavy quarks in 2+1 flavor lattice QCD with application to hyperfine splittings. Physical Review D, 83(3), (doi: 10.1103/PhysRevD.83.034503)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevD.83.034503


We report the nonperturbative tuning of parameters—κ<sub>c</sub>, κ<sub>b</sub>, and κ<sub>crit</sub>—that are related to the bare heavy-quark mass in the Fermilab action. This requires the computation of the masses of D<sub>s</sub>(*) and B<sub>s</sub>(*) mesons comprised of a Fermilab heavy quark and a staggered light quark. Additionally, we report the hyperfine splittings for D<sub>s</sub>(*) and B<sub>s</sub>(*) mesons as a cross-check of our simulation and analysis methods. We find a splitting of 145±15  MeV for the D<sub>s</sub> system and 40±9  MeV for the B<sub>s</sub> 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≈0.15, 0.12, and 0.09 fm.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Laiho, Dr John and DeTar, Professor Carleton
Authors: Bernard, C., DeTar, C., Di Pierro, M., El-Khadra, A., Evans, R., Freeland, E., Gámiz, E., Gottlieb, S., Heller, U., Hetrick, J., Kronfeld, A., Laiho, J., Levkova, L., Mackenzie, P., Simone, J., Sugar, R., Toussaint, D., and Van de Water, R.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN (Online):1089-4918

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
481951Investigations in Quantum Chromodynamics and Physics Beyond the Standard ModelChristine DaviesScience & Technologies Facilities Council (STFC)ST/G00059X/1Physics and Astronomy