Calculation of fermionic two-loop contributions to muon decay

被引：20
|
作者：
Freitas, A
Heinemeyer, S
Hollik, W
Walter, W
Weiglein, G
机构：
[1] DESY, D-22603 Hamburg, Germany
[2] Univ Karlsruhe, Inst Theoret Phys, D-76128 Karlsruhe, Germany
[3] CERN, Div Theory, CH-1211 Geneva 23, Switzerland
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2000年 / 89卷
关键词：
D O I：
10.1016/S0920-5632(00)00827-6
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：
The computation of the correction Deltar in the W-Z mass correlation, derived from muon decay, is described at the two-loop level in the Standard Model. Technical aspects which become relevant at this level are studied, e.g, gauge parameter independent renormalization and the treatment of gamma (5). Exact results for Deltar and the the W mass prediction including O(alpha (2)) corrections with fermion loops are presented and compared with previous results of a next-to-leading order expansion in the top-quark mass.
引用
收藏
页码：82 / 87
页数：6
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