Lattice determination of heavy-light decay constants

被引：59

作者：

Bernard, C ^{[1
]}

DeGrand, T

DeTar, C

Gottlieb, S

Heller, UM

Hetrick, JE

Ishizuka, N

McNeile, C

机构：

[1] Washington Univ, St Louis, MO 63130 USA

[2] Univ Colorado, Boulder, CO 80309 USA

[3] Univ Utah, Salt Lake City, UT 84112 USA

[4] Indiana Univ, Bloomington, IN 47405 USA

[5] Florida State Univ, Supercomp Computat Res Inst, Tallahassee, FL 32306 USA

[6] Univ Pacific, Stockton, CA 95211 USA

[7] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan

[8] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[9] Univ Arizona, Tucson, AZ 85721 USA

[10] RIKEN, Brookhaven Natl Lab, Res Ctr, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.81.4812

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the MILC Collaboration's calculation of f(B), f(Bs), f(D), f(Ds), and their ratios. Our central values come from the quenched approximation, but the quenching error is estimated from N-F = 2 dynamical staggered lattices. We use Wilson light valence quarks and Wilson and static heavy quarks. for example, f(B) = 157 +/- 11(-9-0)(+25+23) MeV, f(Bs)/f(B) = 1.11 +/- 0.02(-0.03)(+0.04) +/- 0.03, f(D), = 210 +/- 9(-9-1)(+25+17) MeV, and f(B)/f(Ds) = 0.75 +/- 0.03(-0.02-0.00),(+0.04+0.08) where the errors are statistical, systematic (within the quenched approximation), and systematic (of quenching), respectively. [S0031-9007(98)07819-3].

引用

页码：4812 / 4815

页数：4

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