Abstract
The first observation of the decays and are reported using an integrated luminosity of recorded by the LHCb experiment. The branching fractions, normalized with respect to and , respectively, are measured to be and , where the first uncertainty is statistical and the second is systematic. The decay is of particular interest as it can be used to measure the weak phase . First observation of the , decay is also presented, and its branching fraction relative to is found to be .
- Received 7 November 2012
DOI:https://doi.org/10.1103/PhysRevD.86.112005
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© 2012 CERN, for the LHCb Collaboration