Abstract
A search for the state in decays is performed with of collisions at collected by the LHCb experiment. No evidence for this state is found, in disagreement with a measurement by CDF. An upper limit on its production rate is set, at 90% confidence level.
- Received 23 February 2012
DOI:https://doi.org/10.1103/PhysRevD.85.091103
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© 2012 CERN, for the LHCb Collaboration