THE RELEVANCE OF THE DIPOLE PENGUIN OPERATORS IN EPSILON'EPSILON

被引：29

作者：

BERTOLINI, S

FABBRICHESI, M

GABRIELLI, E

机构：

[1] CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND

[2] UNIV ROMA LA SAPIENZA,DIP FIS,I-00185 ROME,ITALY

来源：

PHYSICS LETTERS B | 1994年 / 327卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(94)91541-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The standard model contribution to epsilon'/epsilon of the magnetic- and electric-dipole penguin operators Q11 = (g(s)/16pi2) m(s)SBAR sigma(munu) x t(a)Ga(a)muvu) (1 - gamma5) d and Q12 = (eQd/16pi2) m(s)sBAR sigma(muvu) (1 -gamma5) d is discussed. While the electromagnetic penguin Q12 seems to have a vanishingly small matrix element, we find that the gluonic dipole operator Q11 may give a contribution to epsilon'/epsilon comparable to that of other operators so far considered, and should therefore be consistently included in the analysis.

引用

页码：136 / 144

页数：9

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