Search for <i>B</i><SUP>+</SUP> → <i>K</i><SUP>+</SUP>τ<SUP>+</SUP>τ<SUP>-</SUP> at the <i>BABAR</i> Experiment



Lees, JP, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, DN, Kolomensky, Yu G, Koch, H, Schroeder, T
et al (show 223 more authors) (2017) Search for <i>B</i><SUP>+</SUP> → <i>K</i><SUP>+</SUP>τ<SUP>+</SUP>τ<SUP>-</SUP> at the <i>BABAR</i> Experiment. PHYSICAL REVIEW LETTERS, 118 (3). 031802-.

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Abstract

We search for the rare flavor-changing neutral current process B^{+}→K^{+}τ^{+}τ^{-} using data from the BABAR experiment. The data sample, collected at the center-of-mass energy of the ϒ(4S) resonance, corresponds to a total integrated luminosity of 424  fb^{-1} and to 471×10^{6}  BB[over ¯] pairs. We reconstruct one B meson, produced in the ϒ(4S)→B^{+}B^{-} decay, in one of many hadronic decay modes and search for activity compatible with a B^{+}→K^{+}τ^{+}τ^{-} decay in the rest of the event. Each τ lepton is required to decay leptonically into an electron or muon and neutrinos. Comparing the expected number of background events with the data sample after applying the selection criteria, we do not find evidence for a signal. The resulting upper limit, at the 90% confidence level, is B(B^{+}→K^{+}τ^{+}τ^{-})<2.25×10^{-3}.

Item Type: Article
Uncontrolled Keywords: BaBar Collaboration
Depositing User: Symplectic Admin
Date Deposited: 22 Feb 2017 10:01
Last Modified: 12 Oct 2023 05:46
DOI: 10.1103/PhysRevLett.118.031802
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3005821

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