Study of the rare B0s and B0 decays into the π+π−μ+μ− final state

Abstract : A search for the rare decays B0s→π+π−μ+μ− and B0→π+π−μ+μ− is performed in a data set corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5-1.3 GeV/c2 and with muon pairs that do not originate from a resonance are considered. The first observation of the decay B0s→π+π−μ+μ− and the first evidence of the decay B0→π+π−μ+μ− are obtained and the branching fractions are measured to be B(B0s→π+π−μ+μ−)=(8.6±1.5(stat)±0.7(syst)±0.7(norm))×10−8 and B(B0→π+π−μ+μ−)=(2.11±0.51(stat)±0.15(syst)±0.16(norm))×10−8, where the third uncertainty is due to the branching fraction of the decay B0→J/ψ(→μ+μ−)K∗(890)0(→K+π−), used as a normalisation.
Type de document :
Article dans une revue
Physics Letters B, Elsevier, 2015, 743, pp.46-55. 〈10.1016/j.physletb.2015.02.010〉
Liste complète des métadonnées

Littérature citée [34 références]  Voir  Masquer  Télécharger

http://hal.in2p3.fr/in2p3-01098253
Contributeur : Sabine Starita <>
Soumis le : jeudi 2 avril 2015 - 15:26:25
Dernière modification le : jeudi 18 janvier 2018 - 01:50:51
Document(s) archivé(s) le : vendredi 3 juillet 2015 - 10:37:04

Fichier

1-s2.0-S0370269315000738-main....
Publication financée par une institution

Identifiants

Citation

R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Study of the rare B0s and B0 decays into the π+π−μ+μ− final state. Physics Letters B, Elsevier, 2015, 743, pp.46-55. 〈10.1016/j.physletb.2015.02.010〉. 〈in2p3-01098253〉

Partager

Métriques

Consultations de la notice

335

Téléchargements de fichiers

186