B0-(B)over-bar-0 mixing in quenched lattice QCD -: art. no. 014506

被引：19

作者：

Aoki, S ^{[1
]}

Fukugita, M

Hashimoto, S

Ishikawa, KI

Ishizuka, N

Iwasaki, Y

Kanaya, K

Kaneko, T

Kuramashi, Y

Okawa, M

Onogi, T

Tsutsui, N

Ukawa, A

Yamada, N

Yoshié, T

机构：

[1] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan

[2] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan

[3] High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[4] Univ Tsukuba, Ctr Computat Phys, Tsukuba, Ibaraki 3058577, Japan

[5] Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan

[6] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

来源：

PHYSICAL REVIEW D | 2003年 / 67卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.67.014506

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present our results of lattice calculations of B parameters, which parametrize DeltaB=2 transition amplitudes together with the leptonic decay constant. Calculations are made in the quenched approximation at beta=5.7, 5.9, 6.0 and 6.1, using NRQCD action for heavy quarks and the O(a)-improved Wilson action for light quarks. The operators are perturbatively renormalized including the correction of O(alpha(s)/(aM)(m)) (mgreater than or equal to0). We examine the scaling behavior of B parameters, and discuss the systematic uncertainties based on the results with several different truncations of higher order terms in 1/M and alpha(s) expansions. We find B-Bd(m(b))=0.84(3)(5), B-Bs/B-Bd=1.020(21)((+15)(-16))((+5)(-0)) and B-Ss(m(b))=0.85(1)(5)((+1)(-0)) in the quenched approximation. The errors represent statistical and systematic errors as well as the uncertainty in the determination of strange quark mass.

引用

页数：22

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