Search for B+→K+τ+τ− at the BaBar experiment

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 million BB¯¯¯¯ 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 measured branching fraction is (1.31+0.66−0.61( stat.)+0.35−0.25( sys.))×10−3 with an upper limit, at the 90\% confidence level, of B(B+→K+τ+τ−)<2.25×10−3.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2017, 118, pp.031802 〈10.1103/PhysRevLett.118.031802〉
Liste complète des métadonnées

http://hal.in2p3.fr/in2p3-01324497
Contributeur : Claudine Bombar <>
Soumis le : mercredi 1 juin 2016 - 10:00:58
Dernière modification le : jeudi 11 janvier 2018 - 06:14:22

Lien texte intégral

Identifiants

Collections

Citation

J.-P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Search for B+→K+τ+τ− at the BaBar experiment. Physical Review Letters, American Physical Society, 2017, 118, pp.031802 〈10.1103/PhysRevLett.118.031802〉. 〈in2p3-01324497〉

Partager

Métriques

Consultations de la notice

167