The B s 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 B s 0 meson is measured to be 5367.08 ± 0.38 ± 0.15 MeV/c2. The branching fraction ratio ℬ(B s 0  → J/ψϕϕ)/ℬ(B s 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 B s 0  → J/ψϕK + K − or B s 0  → J/ψK + K − K + K − decays is found.

Observation of the B<inf>s</inf>0→ J/ψϕϕ decay / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreassi, G., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2016:3(2016). [10.1007/JHEP03(2016)040]

Observation of the Bs0→ J/ψϕϕ decay

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2016

Abstract

The B s 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 B s 0 meson is measured to be 5367.08 ± 0.38 ± 0.15 MeV/c2. The branching fraction ratio ℬ(B s 0  → J/ψϕϕ)/ℬ(B s 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 B s 0  → J/ψϕK + K − or B s 0  → J/ψK + K − K + K − decays is found.
2016
B physics Branching fraction Hadron-Hadron scattering QCD Spectroscopy
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the B<inf>s</inf>0→ J/ψϕϕ decay / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreassi, G., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2016:3(2016). [10.1007/JHEP03(2016)040]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074165
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