Search for Neutrinoless Tau Decays to Three Leptons.

Kolb, J. A.

Technical Information Center Oak Ridge Tennessee

关键词: Accelerators;    Decay;    Leptons;    Electric charges;    Branching ratio;   

RP-ID  :  DE2008938633

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Using approximately 350 million (tau)(sup +)(tau)(sup -) pair events recorded with the BaBar detector at the Stanford Linear Accelerator Center between 1999 and 2006, a search has been made for neutrinoless, lepton-flavor violating tau decays to three lighter leptons. All six decay modes consistent with conservation of electric charge and energy have been considered. With signal selection efficiencies of 5-12%, we obtain 90% confidence level upper limits on the branching fraction (Beta)((tau) (yields) (ell)(ell)(ell)) in the range (4-8) x 10(sup -8).