Search for B^{+}→K^{+}τ^{+}τ^{-} at the BaBar Experiment.


Lees, JP, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, DN, Kolomensky, YG, Koch, H, Schroeder, T et al (show 224 more authors) (2017) Search for B^{+}→K^{+}τ^{+}τ^{-} at the BaBar Experiment. Phys Rev Lett, 118 (3). 031802 - ?. ISSN 1079-7114

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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
Depositing User: Symplectic Admin
Date Deposited: 15 Feb 2017 11:18
Last Modified: 19 Jan 2023 07:19
DOI: 10.1103/PhysRevLett.118.031802
Open Access URL: http://arxiv.org/pdf/1605.09637.pdf
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3005712

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