QUENCHED HEAVY-LIGHT DECAY CONSTANTS

被引：66

作者：

BAXTER, RM ^{[1
]}

BOOTH, SP ^{[1
]}

BOWLER, KC ^{[1
]}

COLLINS, S ^{[1
]}

HENTY, DS ^{[1
]}

KENWAY, RD ^{[1
]}

RICHARDS, DG ^{[1
]}

SHANAHAN, HP ^{[1
]}

SIMONE, JN ^{[1
]}

SIMPSON, AD ^{[1
]}

WILKES, BE ^{[1
]}

EWING, AK ^{[1
]}

LELLOUCH, L ^{[1
]}

SACHRAJDA, CT ^{[1
]}

WITTIG, H ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON, DEPT PHYS, SOUTHAMPTON SO9 5NH, ENGLAND

来源：

PHYSICAL REVIEW D | 1994年 / 49卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.49.1594

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results for heavy-light decay constants, using both propagating quarks and the static approximation, in 0(a)-improved, quenched lattice QCD. At beta=6.2 on a 24(3)X48 lattice we findf(D)=185(-3)(+4)(stat)(-7)(+42)(syst) MeV, f(B)= 160(-6-19)(+6+53) MeV, f(Ds)/f(D)=1.18(-2)(+2), and f(Bs)/f(B)=1.22(-3)(+4), in good agreement with earlier studies. From the static theory we obtain f(B)(stat)=253(-15-15)(+16+105) MeV. We also present results from a simulation at beta=6.0 on a 16(3)X48 lattice, which are consistent with those at beta=6.2. In order to study the effects of improvement, we present a direct comparison of the results using both the Wilson and the improved action at beta=6.0.

引用

页码：1594 / 1605

页数：12

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