Abstract
Structure of the decay is studied using data corresponding to of integrated luminosity from collisions produced by the LHC and collected by the LHCb detector. Five interfering states are required to describe the decay: , and . An alternative model including these states and a nonresonant component also provides a good description of the data. Based on the different transversity components measured for the spin-2 intermediate states, the final state is found to be compatible with being entirely odd. The -even part is found to be at a 95% confidence level. The state is not observed, allowing a limit to be set on the absolute value of the mixing angle with the of at a 90% confidence level, consistent with a tetraquark interpretation of the substructure.
13 More- Received 25 February 2014
DOI:https://doi.org/10.1103/PhysRevD.89.092006
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© 2014 CERN, for the LHCb Collaboration