Lepton flavour violation and baryon number non-conservation in τ → Λ+h

被引：2
|
作者：
Lafferty, G. D. [1 ]
机构：
[1] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2007年 / 169卷
关键词：
D O I：
10.1016/j.nuclphysbps.2007.02.111
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 have searched for the violation of baryon number B and lepton number L in the (B-L)-conserving modes tau(-) -> (Lambda) over bar pi(-) and tau(-) -> (Lambda) over barK(-) as well as the (B-L)-violating modes tau(-) -> Lambda pi(-) and tau(-) -> Lambda K- using 237 fb(-1) of data collected with the BABAR. detector at the PEP-II asymmetric-energy e(+)e(-) storage rings. We do not observe any signal and we determine preliminary upper limits on the branching fractions B(tau(-) -> (Lambda) over bar pi(-)>) < 5.9 x 10(-18) B(tau(-) -> Lambda pi(-)) < 5.8 x 10(-8), B(tau(-) -> (Lambda) over barK(-)) < 7.2 x 10(-8), and B(tau(-) -> Lambda K-) < 15 x 10(-8) at 90% confidence level.
引用
收藏
页码：186 / 191
页数：6
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