The decay constants f(B) and f(D+) from three-flavor lattice QCD

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We present new preliminary results for the leptonic decay constants f{sub B} and f{sub D+} determined in 2+1 flavor lattice QCD at lattice spacings a = 0.09, 0.12 and 0.15 fm. Results are obtained using the MILC Collaboration gauge configuration ensembles, clover heavy quarks in the Fermilab interpretation and improved staggered light quarks. Decay constants, computed at partially quenched combinations of the valence and sea light quark masses, are used to determine the low-energy parameters of staggered chiral perturbation theory. The physical decay constants are found in an extrapolation using the parameterized chiral formula.

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7 pages

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Bernard, C.; DeTar, C.; Di Pierro, M.; El-Khadra, A. X.; Evans, R. T.; Freeland, E. et al. January 1, 2007.

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We present new preliminary results for the leptonic decay constants f{sub B} and f{sub D+} determined in 2+1 flavor lattice QCD at lattice spacings a = 0.09, 0.12 and 0.15 fm. Results are obtained using the MILC Collaboration gauge configuration ensembles, clover heavy quarks in the Fermilab interpretation and improved staggered light quarks. Decay constants, computed at partially quenched combinations of the valence and sea light quark masses, are used to determine the low-energy parameters of staggered chiral perturbation theory. The physical decay constants are found in an extrapolation using the parameterized chiral formula.

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7 pages

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  • Journal Name: PoS LAT2007:370,2007; Conference: Contributed to 25th International Symposium on Lattice Field Theory, Regensburg, Germany, 30 Jul - 4 Aug 2007

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  • Report No.: FERMILAB-CONF-07-742-T
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 932869
  • Archival Resource Key: ark:/67531/metadc897981

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  • January 1, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 7, 2016, 10:25 a.m.

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Bernard, C.; DeTar, C.; Di Pierro, M.; El-Khadra, A. X.; Evans, R. T.; Freeland, E. et al. The decay constants f(B) and f(D+) from three-flavor lattice QCD, article, January 1, 2007; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc897981/: accessed July 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.