Complete two loop electroweak contributions to the muon lifetime in the Standard Model

被引：88

作者：

Awramik, M

Czakon, M

机构：

[1] Inst Nucl Phys, PL-31342 Krakow, Poland

[2] Silesian Univ, Inst Phys, Dept Field Theory & Particle Phys, PL-40007 Katowice, Poland

来源：

PHYSICS LETTERS B | 2003年 / 568卷 / 1-2期

关键词：

D O I：

10.1016/j.physletb.2003.06.007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An independent result for the two loop fermionic contributions to the muon lifetime in the Standard Model is obtained and slight deviations in the prediction of the W boson mass are found with respect to [Phys. Lett. B 495 (2000) 338; Nucl. Phys. B 632 (2002) 189]. Supplied with the bosonic contributions from [Phys. Rev. Lett. 89 (2002) 241801; hep-ph/0211041; Phys. Lett. B 551 (2003) 111; hep-ph/0209084], the shift, due to the complete electroweak contributions, varies from -2.4 to -0.6 Mev Additionally, a new test of the matching procedure defining the Fermi constant is presented, which uses fermion masses as infrared regulators. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：48 / 54

页数：7

共 54 条

[1] O(ALPHA-ALPHA(S)(2)) CORRECTION TO THE ELECTROWEAK RHO-PARAMETER [J].