Kaon B-parameter from quenched domain-wall QCD

被引：42

作者：

Aoki, Y.

Blum, T.

Christ, N. H.

Dawson, C.

Izubuchi, T.

Mawhinney, R. D.

Noaki, J.

Ohta, S.

Orginos, K.

Soni, A.

Yamada, N.

机构：

[1] Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany

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

[3] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA

[4] Columbia Univ, Dept Phys, New York, NY 10027 USA

[5] Kanazawa Univ, Inst Theoret Phys, Kanazawa, Ishikawa 9201192, Japan

[6] KEK, Inst Particle & Nucl Studies, Ibaraki 3050801, Japan

[7] Grad Univ Adv Studies, Tsukuba, Ibaraki 3050801, Japan

[8] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

[9] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW D | 2006年 / 73卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.73.094507

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present numerical results for the kaon B-parameter, B-K, determined in the quenched approximation of lattice QCD. Our simulations are performed using domain-wall fermions and the renormalization group improved, DBW2 gauge action which combine to give quarks with good chiral symmetry at finite lattice spacing. Operators are renormalized nonperturbatively using the RI/MOM scheme. We study scaling by performing the simulation on two different lattices with a(-1)=1.982(30) and 2.914(54) GeV. We combine this quenched scaling study with an earlier calculation of B-K using two flavors of dynamical, domain-wall quarks at a single lattice spacing to obtain B-K((MS) over bar NDR)(mu=2 GeV)=0.563(21)(39)(30), were the first error is statistical, the second systematic (without quenching errors) and the third estimates the error due to quenching.

引用

页数：33

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