Constraints on non-standard contributions to the charged-current interactions

被引：8
|
作者：
Hagiwara, K [1 ]
Matsumoto, S
机构：
[1] KEK, Theory Grp, Tsukuba, Ibaraki 305, Japan
[2] Univ Tokyo, ICEPP, Bunkyo Ku, Tokyo 113, Japan
[3] CERN, Div TH, CH-1211 Geneva 23, Switzerland
来源：
PHYSICS LETTERS B | 1998年 / 424卷 / 3-4期
关键词：
D O I：
10.1016/S0370-2693(98)00224-X
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The success of the quantum level predictions of the Standard Model on the Z boson properties, on m(w) and on m(t), which makes use of the muon life time as an input, implies a stringent constraint on new physics contributions to the V-A charged-current interactions among leptons. Observed unitarity of the CKM matrix elements then implies constraints on non-standard contributions to the lepton-quark charged-current interactions. By using the recent electroweak; data as inputs, we find thr 95% CL limits for the corresponding contact interactions: A(CC.+)(ll) purely leptonic terms, and A(CC.+)(ll) > 5.X TeV and A(CC.-)'(q) > 10.1 TeV for the Published by Elsevier Science B.V.
引用
收藏
页码：362 / 366
页数：5
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