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2017-01-20

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/132631

Search for B+ -> K+tau(+)tau(-) at the BABAR Experiment

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https://doi.org/10.1103/PhysRevLett.118.031802

Abstract

We search for the rare flavor-changing neutral current process B+ -> K+tau(+)tau(-) using data from the BABAR experiment. The data sample, collected at the center-of-mass energy of the Upsilon(4S) resonance, corresponds to a total integrated luminosity of 424 fb(-1) and to 471 x 10(6) B (B) over bar pairs. We reconstruct one B meson, produced in the Upsilon(4S) -> B+B- decay, in one of many hadronic decay modes and search for activity compatible with a B+ -> K+tau(+)tau(-) decay in the rest of the event. Each tau 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+tau(+)tau(-)) < 2.25 x 10(-3).

Subject

Física de partícules, Experiments

Subject (English)

Particle physics, Experiments

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

GRAUGÉS POUS, Eugeni and BABAR Collaboration. Search for B+ -> K+tau(+)tau(-) at the BABAR Experiment. Physical Review Letters. 2017. Vol. 118, num. 3, pags. 031802. ISSN 0031-9007. [consulted: 13 of August of 2026]. Available at: https://hdl.handle.net/2445/132631

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