Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/132631
Title: | Search for B+ -> K+tau(+)tau(-) at the BABAR Experiment |
Author: | Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 20-Jan-2017 |
Publisher: | American Physical Society |
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). |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.118.031802 |
It is part of: | Physical Review Letters, 2017, vol. 118, num. 3, p. 031802 |
URI: | http://hdl.handle.net/2445/132631 |
Related resource: | https://doi.org/10.1103/PhysRevLett.118.031802 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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