Lattice results for the decay constant of heavy-light vector mesons

被引：13

作者：

Bernard, C ^{[1
]}

Williams, P

Datta, S

Gottlieb, S

DeTar, C

Heller, UM

McNeile, C

Orginos, K

Sugar, R

Toussaint, D

机构：

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

[2] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[3] Univ Utah, Dept Phys, Salt Lake City, UT 84114 USA

[4] Florida State Univ, CSIT, Tallahassee, FL 32306 USA

[5] Univ Liverpool, Dept Math Sci, Liverpool L69 3BX, Merseyside, England

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

[7] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[8] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

来源：

PHYSICAL REVIEW D | 2002年 / 65卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.65.014510

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the leptonic decay constants of heavy-light vector mesons in the quenched approximation. The reliability of lattice computations for heavy quarks is checked by comparing the ratio of vector to pseudoscalar decay constant with the prediction of heavy quark effective theory in the limit of an infinitely heavy quark mass. Good agreement is found. We then calculate the decay constant ratio for B mesons: f(B)*/f(B) = 1.01(0.01)((+0.04)(-0.01)). We also quote quenched f(B)*=177(6)(17) MeV.

引用

页数：5

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