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 B s 0 → ϕϕ branching fraction is measured to be (formula presented.)where f s/f d represents the ratio of the B s 0to B 0 production cross-sections, and the B 0 → 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 B 0 → 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.
Bibliographical notePublisher Copyright:
© 2015, The Author(s).
Copyright 2016 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics