Lattice Determination of Heavy-Light Decay Constants

Journal Article · Sun Nov 01 00:00:00 EST 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.81.4812· OSTI ID:300113

Bernard, C ^[1]; DeGrand, T ^[2]; DeTar, C; McNeile, C ^[3]; Gottlieb, S ^[4]; Heller, U M ^[5]; Hetrick, J E ^[6]; Ishizuka, N ^[7]; Sugar, R ^[8]; Toussaint, D ^[9]; Wingate, M ^[10]

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1. Washington University, St. Louis, Missouri 63130 (United States)
2. University of Colorado, Boulder, Colorado 80309 (United States)
3. University of Utah, Salt Lake City, Utah 84112. (United States)
4. Indiana University, Bloomington, Indiana 47405 (United States)
5. SCRI, The Florida State University, Tallahassee, Florida 32306-4130. (United States)
6. University of the Pacific, Stockton, California 95211-0197. (United States)
7. University of Tsukuba, Tsukuba Ibaraki 305, (Japan)
8. University of California, Santa Barbara, California 93106. (United States)
9. University of Arizona, Tucson, Arizona 85721 (United States)
10. RIKEN BNL Research Center, Upton, New York 11973. (United States)

We report on the MILC Collaboration{close_quote}s calculation of f{sub B} , f{sub B{sub s}} , f{sub D} , f{sub D{sub s}} , and their ratios. Our central values come from the quenched approximation, but the quenching error is estimated from N{sub F}2 dynamical staggered lattices. We use Wilson light valence quarks and Wilson and static heavy quarks. We find, for example, f{sub B}=157{plus_minus}11{sup +25+23}{sub {minus}9{minus}0} MeV , f{sub B{sub s}}/f{sub B}=1.11{plus_minus}0.0 2{sup +0.04}{sub {minus}0.03}{plus_minus}0.03 , f{sub D{sub s}}=210{plus_minus}9{sup +25+17}{sub {minus} 9{minus}1} MeV , and f{sub B}/f{sub D{sub s}}=0.75{plus_minus}0.0 3{sup +0.04+0.08}{sub {minus}0.02{minus}0.00} , where the errors are statistical, systematic (within the quenched approximation), and systematic (of quenching), respectively. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 300113
• Journal Information: Physical Review Letters, Vol. 81, Issue 22; Other Information: PBD: Nov 1998
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
PARTICLE DECAY
B MESONS
D MESONS
LATTICE FIELD THEORY
QUARKS
QUANTUM CHROMODYNAMICS