B-meson decay constant from unquenched lattice QCD -: art. no. 212001

被引：158

作者：

Gray, A ^{[1
]}

Wingate, M

Davies, CTH

Gulez, E

Lepage, GP

Mason, Q

Nobes, M

Shigemitsu, J

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[2] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

[3] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[4] Cornell Univ, Lab Elementary Particle Phys, Ithaca, NY 14853 USA

[5] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 9EW, England

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.95.212001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present determinations of the B-meson decay constant f(B) and of the ratio f(Bs)/f(B) using the MILC Collaboration unquenched gauge configurations, which include three flavors of light sea quarks. The mass of one of the sea quarks is kept around the strange quark mass, and we explore a range in masses for the two lighter sea quarks down to m(s)/8. The heavy b quark is simulated using nonrelativistic QCD, and both the valence and sea light quarks are represented by the highly improved (AsqTad) staggered quark action. The good chiral properties of the latter action allow for a more accurate chiral extrapolation to physical up and down quarks than has been possible in the past. We find f(B)=216(9)(19)(4)(6) MeV and f(Bs)/f(B)=1.20(3)(1).

引用

页数：4

共 25 条

[1] Mass of the Bc meson in three-flavor lattice QCD -: art. no. 172001 [J].

Allison, IF ;

Davies, CTH ;

Gray, A ;

Kronfeld, AS ;

Mackenzie, PB ;

Simone, JN .

PHYSICAL REVIEW LETTERS, 2005, 94 (17)

[2] Charmed-meson decay constants in three-flavor lattice QCD [J].

Aubin, C ;

Bernard, C ;

DeTar, C ;

Di Pierro, M ;

Freeland, ED ;

Gottlieb, S ;

Heller, UM ;

Hetrick, JE ;

El-Khadra, AX ;

Kronfeld, AS ;

Levkova, L ;

Mackenzie, PB ;

Menscher, D ;

Maresca, F ;

Nobes, M ;

Okamoto, M ;

Renner, D ;

Simone, J ;

Sugar, R ;

Toussaint, D ;

Trottier, HD .

PHYSICAL REVIEW LETTERS, 2005, 95 (12)

[3] Semileptonic decays of D mesons in three-flavor lattice QCD -: art. no. 011601 [J].

Aubin, C ;

Bernard, C ;

DeTar, C ;

DiPierro, M ;

El-Khadra, A ;

Gottlieb, S ;

Gregory, EB ;

Heller, UM ;

Hetrick, J ;

Kronfeld, AS ;

Mackenzie, PB ;

Menscher, D ;

Nobes, M ;

Okamoto, M ;

Oktay, MB ;

Osborn, J ;

Simone, J ;

Sugar, R ;

Toussaint, D ;

Trottier, HD .

PHYSICAL REVIEW LETTERS, 2005, 94 (01)

[4] Staggered chiral perturbation theory with heavy-light mesons [J].

Aubin, C ;

Bernard, C .

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2005, 140 :491-493

[5] Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD [J].

Aubin, C ;

Bernard, C ;

DeTar, C ;

Osborn, J ;

Gottlieb, S ;

Gregory, EB ;

Toussaint, D ;

Heller, UM ;

Hetrick, JE ;

Sugar, R .

PHYSICAL REVIEW D, 2004, 70 (11) :114501-1

[6] First determination of the strange and light quark masses from full lattice QCD [J].

Aubin, C ;

Bernard, C ;

Davies, CTH ;

DeTar, C ;

Gottlieb, SA ;

Gray, A ;

Gregory, EB ;

Hein, J ;

Heller, UM ;

Hetrick, JE ;

Lepage, GP ;

Mason, Q ;

Osborn, J ;

Shigemitsu, J ;

Sugar, R ;

Toussaint, D ;

Trottier, H ;

Wingate, M .

PHYSICAL REVIEW D, 2004, 70 (03)

[7] Light hadrons with improved staggered quarks: Approaching the continuum limit [J].

Aubin, C ;

Bernard, C ;

DeTar, C ;

Osborn, J ;

Gottlieb, S ;

Gregory, EB ;

Toussaint, D ;

Heller, UM ;

Hetrick, JE ;

Sugar, R .

PHYSICAL REVIEW D, 2004, 70 (09)

[8] Pion and kaon masses in staggered chiral perturbation theory [J].

Aubin, C ;

Bernard, C .

PHYSICAL REVIEW D, 2003, 68 (03)

[9] Chiral logs in the presence of staggered flavor symmetry breaking [J].

Bernard, C .

PHYSICAL REVIEW D, 2002, 65 (05)

[10] QCD spectrum with three quark flavors [J].

Bernard, C ;

Burch, T ;

Orginos, K ;

Toussaint, D ;

DeGrand, TA ;

DeTar, C ;

Datta, S ;

Gottlieb, S ;

Heller, UM ;

Sugar, R .

PHYSICAL REVIEW D, 2001, 64 (05)

← 1 2 3 →