The decay constants f(B) and f(D+) from three-flavor lattice QCD Page: 1 of 7
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FERMI LAB-CON F-07-742-T
The decay constants fB and fD+ from three-flavor
C. Bernarda, C. DeTarb, M. Di Pierroc, A.X. El-Khadrad, R.T. Evansd, E. Freeland',
E. Gamizd, Steven Gottliebf, U.M. Hellerg, J.E. Hetrickh, R. Jaind, A.S. Kronfeldi, f)
J. Laihoia, L. Levkovab, P.B. Mackenzie , D. Renneri, J.N. Simone*", R. Sugark,
D. Toussainti, and R.S. Van de Wateri
aDepartment of Physics, Washington University, St. Louis, Missouri, USA
bPhysics Department, University of Utah, Salt Lake City, Utah, USA
cSchool of Computer Sci., Telecom. and Info. Systems, DePaul University, Chicago, Illinois, USA
dPhysics Department, University of Illinois, Urbana, Illinois, USA
eLiberal Arts Department, The School of the Art Institute of Chicago, Chicago, Illinois, USA
fDepartment of Physics, Indiana University, Bloomington, Indiana, USA
gAmerican Physical Society, One Research Road, Box 9000, Ridge, New York, USA
hPhysics Department, University of the Pacific, Stockton, California, USA
Fermi National Accelerator Laboratory, Batavia, Illinois, USA
iDepartment of Physics, University of Arizona, Tucson, Arizona, USA
kDepartment of Physics, University of California, Santa Barbara, California, USA
E-mail: simone@fnal . gov
Fermilab Lattice and MILC Collaborations
We present new preliminary results for the leptonic decay constants fB and fD+ 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 Fermi-
lab 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.
The XXV International Symposium on Lattice Field Theory
July 30-4 August 2007
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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/m1/1/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.