Weak matrix elements without quark masses on the lattice

被引：1
|
作者：
Giusti, L [1 ]
机构：
[1] Boston Univ, Dept Phys, Boston, MA 02215 USA
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2000年 / 86卷
关键词：
D O I：
10.1016/S0920-5632(00)00579-X
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 introduce a new parameterization of four-fermion matrix elements which does not involve quark masses and thus allows a reduction of systematic uncertainties in physical amplitudes. As a result the apparent quadratic dependence of epsilon'/epsilon on m(s)(mu) is removed. To simplify the matching between lattice and continuum renormalization schemes, we express our results in terms of Renormalization Group Invariant B-parameters which are renormalization-scheme and scale independent. As an application of our proposal, matrix elements of Delta I = 3/2 and SUSY Delta F = 2 (F = S, C, B) four-fermion operators have been computed.
引用
收藏
页码：299 / 302
页数：4
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