Bosonic corrections to the effective weak mixing angle at O(α2)

被引：34
作者：
Awramik, M.
Czakon, M. [1 ]
Freitas, A.
机构：
[1] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany
[2] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg, Germany
[3] Inst Nucl Phys, PL-31342 Krakow, Poland
[4] Silesian Univ, Inst Phys, Dept Field Theory & Particle Phys, PL-40007 Katowice, Poland
[5] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland
来源：
PHYSICS LETTERS B | 2006年 / 642卷 / 5-6期
关键词：
D O I：
10.1016/j.physletb.2006.07.035
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the complete bosonic contributions to the effective weak mixing angle, sin(2)theta(lept)(eff), at the two-loop level in the electroweak interactions. We find their size to be about three times smaller than inferred from simple estimates from lower orders. In particular, for a Higgs boson mass, M-H, of 100 GeV they amount to 4 x 10(-6), and drop down by about an order of magnitude for M-H = 200 GeV. We estimate the intrinsic error of the theory prediction of sin(2)theta(lept)(eff) (c) 2006 Elsevier B.V. All rights reserved.
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页码：563 / 566
页数：4
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