Find Paper, Faster
Example:10.1021/acsami.1c06204 or Chem. Rev., 2007, 107, 2411-2502
Upper limits on branching ratios of the lepton-flavor-violating decaysτ→ℓγγandτ→ℓX
Physical Review D  (IF5.296),  Pub Date : 2021-10-25, DOI: 10.1103/physrevd.104.075032
Douglas Bryman, Shintaro Ito, Robert Shrock

From analysis of data produced by the BABAR experiment, the first upper bounds (90% C.L.) were obtained on the branching ratios Br(τeγγ)<2.5×104 and Br(τμγγ)<5.8×104. In addition, improved upper bounds (95% C.L.) were found on branching ratios Br(τeX)<1.4×103 and Br(τμX)<2.0×103, where X is an undetected weakly interacting boson with mass mX<1.6GeV/c2.