Using a dataset corresponding to an integrated luminosity of 3.0 fb−1 collected in pp collisions at centre-of-mass energies of 7 and 8 TeV, the Bs0 → ϕϕ branching fraction is measured to be (formula presented.)where fs/fd represents the ratio of the Bs0to B0 production cross-sections, and the B0 → ϕK*(892)0 decay mode is used for normalization. This is the most precise measurement of this branching fraction to date, representing a factor five reduction in the statistical uncertainty compared with the previous best measurement. A search for the decay B0 → ϕϕ is also made. No signal is observed, and an upper limit on the branching fraction is set as(formula presented.)at 90% confidence level. This is a factor of seven improvement compared to the previous best limit.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Measurement of the Bs0 → ϕϕ branching fraction and search for the decay B0 → ϕϕ. JOURNAL OF HIGH ENERGY PHYSICS, 2015(10) [10.1007/JHEP10(2015)053].

Measurement of the Bs0 → ϕϕ branching fraction and search for the decay B0 → ϕϕ

Belloli, N.;Calvi, M.;Carniti, P.;Cassina, L.;Gotti, C.;Grillo, L.;Khanji, B.;Martinelli, M.;Matteuzzi, C.;Petruzzo, M.;
2015

Abstract

Using a dataset corresponding to an integrated luminosity of 3.0 fb−1 collected in pp collisions at centre-of-mass energies of 7 and 8 TeV, the Bs0 → ϕϕ branching fraction is measured to be (formula presented.)where fs/fd represents the ratio of the Bs0to B0 production cross-sections, and the B0 → ϕK*(892)0 decay mode is used for normalization. This is the most precise measurement of this branching fraction to date, representing a factor five reduction in the statistical uncertainty compared with the previous best measurement. A search for the decay B0 → ϕϕ is also made. No signal is observed, and an upper limit on the branching fraction is set as(formula presented.)at 90% confidence level. This is a factor of seven improvement compared to the previous best limit.
Articolo in rivista - Articolo scientifico
B physics; Branching fraction; Flavor physics; Hadron-Hadron Scattering; Nuclear and High Energy Physics
English
18
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Measurement of the Bs0 → ϕϕ branching fraction and search for the decay B0 → ϕϕ. JOURNAL OF HIGH ENERGY PHYSICS, 2015(10) [10.1007/JHEP10(2015)053].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/187905
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