Abstract
A search for the decays and is performed with data collected at the LHCb experiment corresponding to an integrated luminosity of . The decays and are observed for the first time, while first evidence is reported for the and decays. The branching fractions of these decays are determined relative to the decay. The mass is measured, using the final state, to be . This is the most precise single measurement of the mass to date.
- Received 23 December 2016
DOI:https://doi.org/10.1103/PhysRevD.95.032005
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© 2017 CERN, for the LHCb Collaboration