B meson B-parameters and the decay constant in two-flavor dynamical QCD

被引：49

作者：

Yamada, N ^{[1
]}

Aoki, S

Burkhalter, R

Fukugita, M

Hashimoto, S

Ishikawa, KI

Ishizuka, N

Iwasaki, Y

Kanaya, K

Kaneko, T

Kuramashi, Y

Okawa, M

Onogi, T

Tominaga, S

Tsutsui, N

Ukawa, A

Yoshié, T

机构：

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

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

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

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

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

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2002年 / 106卷

基金：

日本学术振兴会;

关键词：

D O I：

10.1016/S0920-5632(01)01726-1

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We present a two-flavor dynamical QCD calculation of the B meson B parameters and decay constant. We use NRQCD for heavy quark and the nonperturbatively O(a)-improved Wilson action for light quark at beta = 5.2 on a 20(3) x 48 lattice. We confirm that the sea quark effect increases the heavy-light decay constant, while estimate of its magnitude depends significantly on the fitting form in the chiral extrapolation. For the B parameters, on the other hand, we do not find a significant sea quark effect. The chiral extrapolation with logarithmic term is examined for both quantities and compared with the prediction of CbPT.

引用

页码：397 / 399

页数：3

共 8 条

[1]

ANASTASSOV A, HEPEX0108043 CLEO CO

[2] Heavy quark physics on the lattice [J].

Bernard, C .

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2001, 94 :159-176

[3] QUENCHED CHIRAL PERTURBATION-THEORY FOR HEAVY-LIGHT MESONS [J].

BOOTH, MJ .

PHYSICAL REVIEW D, 1995, 51 (05) :2338-2346

[4] B meson leptonic decay constant with quenched lattice NRQCD -: art. no. 074501 [J].

Ishikawa, KI ;

Yamada, N ;

Aoki, S ;

Fukugita, M ;

Hashimoto, S ;

Iskizuka, N ;

Iwasaki, Y ;

Kanaya, K ;

Kaneda, T ;

Kaya, S ;

Kuramashi, Y ;

Matsufuru, H ;

Okawa, M ;

Onogi, T ;

Tominaga, S ;

Tsutsui, N ;

Ukawa, A ;

Yoshié, T .

PHYSICAL REVIEW D, 2000, 61 (07)

[5] O(a) improvement of lattice QCD with two flavors of Wilson quarks [J].

Jansen, K ;

Sommer, R .

NUCLEAR PHYSICS B, 1998, 530 (1-2) :185-203

[6] Quenched chiral perturbation theory for heavy-light mesons [J].

Sharpe, SR ;

Zhang, Y .

PHYSICAL REVIEW D, 1996, 53 (09) :5125-5135

[7] Extraction of the D*Dπ coupling from D* decays [J].

Stewart, IW .

NUCLEAR PHYSICS B, 1998, 529 (1-2) :62-80

[8] B0-(B)over-bar0 mixing with quenched lattice NRQCD [J].