Lattice B-parameters for ΔS=2 and ΔI=3/2 operators

被引：44

作者：

Conti, L

Donini, A

Gimenez, V

Martinelli, G

Talevi, M

Vladikas, A

机构：

[1] INFN, Sez Roma 2, I-00133 Rome, Italy

[2] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[4] INFN, I-00185 Rome, Italy

[5] Univ Valencia, Dept Fis Teor, E-46100 Valencia, Spain

[6] Univ Valencia, IFIC, E-46100 Valencia, Spain

[7] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

PHYSICS LETTERS B | 1998年 / 421卷 / 1-4期

关键词：

D O I：

10.1016/S0370-2693(98)00019-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute several matrix elements of dimension-six four-fermion operators and extract their B-parameters. The calculations have been performed with the tree-level Clover action at beta = 6.0. The renormalization constants and mixing coefficients of the lattice operators have been obtained non-perturbatively. In the <(MS)over bar> renormalization scheme, at a renormalization scale mu similar or equal to 2 GeV, we find B-K(B-9(3/2))=0.66(11), B-7(3/2)=0.72(5) and B-8(3/2)=1.03(3). The result for B-8(3/2) has important implications for the calculation of epsilon'/epsilon. (C) 1998 Elsevier Science B.V.

引用

页码：273 / 282

页数：10

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