Observation of the B (s) (0) -> aEuro parts per thousand J/psi I center dot I center dot decay

Bonivento, W.;COGONI, VIOLETTA;Dettori, F.;Lai, A.;MANCA, GIULIA;OLDEMAN, RUDOLF GERHARD CHRISTIAAN;SAITTA, BIAGIO;VACCA, CLAUDIA;
2016-01-01

Abstract

The Bs 0 → J/ψϕϕ decay is observed in pp collision data corresponding to an integrated luminosity of 3 fb−1 recorded by the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV. This is the first observation of this decay channel, with a statistical significance of 15 standard deviations. The mass of the Bs 0 meson is measured to be 5367.08 ± 0.38 ± 0.15 MeV/c2. The branching fraction ratio ℬ(Bs 0 → J/ψϕϕ)/ℬ(Bs 0 → J/ψϕ) is measured to be 0.0115 ± 0.0012− 0.0009 + 0.0005. In both cases, the first uncertainty is statistical and the second is systematic. No evidence for non-resonant Bs 0 → J/ψϕK+K− or Bs 0 → J/ψK+K−K+K− decays is found.
2016
Inglese
2016
3
1
18
18
Esperti anonimi
scientifica
Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle, P ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
725
none
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