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 B0 s → φφ branching fraction is measured to be B(B0 s → φφ) = (1.84 ± 0.05(stat) ± 0.07(syst) ± 0.11 (fs/fd) ± 0.12 (norm) ) × 10−5 , where fs/fd represents the ratio of the B0 s to 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 B(B 0 → φφ) < 2.8 × 10−8 at 90% confidence level. This is a factor of seven improvement compared to the previous best limit.

Measurement of the B<inf>s</inf>0→ ϕϕ branching fraction and search for the decay B0→ ϕϕ / 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. - 2015:10(2015). [10.1007/JHEP10(2015)053]

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

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
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 B0 s → φφ branching fraction is measured to be B(B0 s → φφ) = (1.84 ± 0.05(stat) ± 0.07(syst) ± 0.11 (fs/fd) ± 0.12 (norm) ) × 10−5 , where fs/fd represents the ratio of the B0 s to 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 B(B 0 → φφ) < 2.8 × 10−8 at 90% confidence level. This is a factor of seven improvement compared to the previous best limit.
2015
Hadron-Hadron Scattering Branching fraction B physics Flavor physics
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the B<inf>s</inf>0→ ϕϕ branching fraction and search for the decay B0→ ϕϕ / 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. - 2015:10(2015). [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/11573/1074837
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