Search for the Decays B<sub>S</sub><SUP>0</SUP> → τ<SUP>+</SUP> τ<SUP>-</SUP> and B<SUP>0</SUP> → τ<SUP>+</SUP> τ<SUP>-</SUP>



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G
et al (show 768 more authors) (2017) Search for the Decays B<sub>S</sub><SUP>0</SUP> → τ<SUP>+</SUP> τ<SUP>-</SUP> and B<SUP>0</SUP> → τ<SUP>+</SUP> τ<SUP>-</SUP>. PHYSICAL REVIEW LETTERS, 118 (25). 251802-.

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Abstract

A search for the rare decays B_{s}^{0}→τ^{+}τ^{-} and B^{0}→τ^{+}τ^{-} is performed using proton-proton collision data collected with the LHCb detector. The data sample corresponds to an integrated luminosity of 3  fb^{-1} collected in 2011 and 2012. The τ leptons are reconstructed through the decay τ^{-}→π^{-}π^{+}π^{-}ν_{τ}. Assuming no contribution from B^{0}→τ^{+}τ^{-} decays, an upper limit is set on the branching fraction B(B_{s}^{0}→τ^{+}τ^{-})<6.8×10^{-3} at the 95% confidence level. If instead no contribution from B_{s}^{0}→τ^{+}τ^{-} decays is assumed, the limit is B(B^{0}→τ^{+}τ^{-})<2.1×10^{-3} at the 95% confidence level. These results correspond to the first direct limit on B(B_{s}^{0}→τ^{+}τ^{-}) and the world's best limit on B(B^{0}→τ^{+}τ^{-}).

Item Type: Article
Additional Information: 21 pages, 10 figures. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-003.html
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 11 Sep 2017 13:21
Last Modified: 14 Oct 2023 09:14
DOI: 10.1103/PhysRevLett.118.251802
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3009393