The branching fraction of τ−−>π−K0SK0S(π0)ντ decays

The BaBar Collaboration, Philip Clark

Research output: Contribution to journalArticlepeer-review


We present a study of tau- --> pi- K0S K0S (pi0) nu and tau- --> K- K0S K0S (pi0) nu decays using a dataset of 430 million tau lepton pairs, corresponding to an integrated luminosity of 468 fb-1, collected with the BaBar detector at the PEP-II asymmetric energy e+e- storage rings. We measure branching fractions of (2.31 +/- 0.04 +/- 0.08)x10^{-4} and (1.60 +/- 0.20 +/- 0.22)x10^{-5} for the tau- --> pi- K0S K0S nu and tau- --> pi- K0S K0S pi0 nu decays, respectively. We find no evidence for tau- --> K- K0S K0S nu and tau- --> K- K0S K0S pi0 nu decays and place upper limits on the branching fractions of 6.3 x 10^{-7) and 4.0 x 10^{-7} at the 90% confidence level.
Original languageEnglish
Pages (from-to)092013
Number of pages1
JournalPhysical Review D
Early online date1 Aug 2012
Publication statusPublished - 26 Nov 2012


Dive into the research topics of 'The branching fraction of τ−−>π−K0SK0S(π0)ντ decays'. Together they form a unique fingerprint.

Cite this