EQUATIONS OF MOTION FOR EFFECTIVE LAGRANGIANS AND PENGUINS IN RARE B-DECAYS

被引：64

作者：

SIMMA, H

机构：

[1] Deutsches Elektronen-Synchrotron DESY, Hamburg, D-22607

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1994年 / 61卷 / 01期

关键词：

D O I：

10.1007/BF01641888

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 study the application of the classical equations of motion (EOM) within the framework of an effective low-energy Lagrangian treated at the loop level. Gauge-fixing and ghost terms, which enter naturally in the EOM, are found to lead to no physical effects-neither through operator mixing nor in matrix elements. Beyond first order in the effective interactions, contact terms have to be included when reducing the effective Lagrangian and we present an explicit procedure to construct them. Applied to (hadronic) rare B-decays, the EOM drastically simplify the effective Lagrangian and its matching to the underlying theory, and certain cancellations of large (logarithmic) contributions become more transparent. Finally, we discuss details of the 'matching' of the effective Lagrangian, which may be helpful in incorporating short distance QCD corrections in further phenomenological studies.

引用

页码：67 / 81

页数：15

共 58 条

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