Abstract
An angular analysis of decays is performed, using proton-proton collision data corresponding to an integrated luminosity of collected with the LHCb detector. The spectrum is divided into fine bins. In each bin, the hypothesis that the three-dimensional angular distribution can be described by structures induced only by resonances is examined, making minimal assumptions about the system. The data reject the -only hypothesis with a large significance, implying the observation of exotic contributions in a model-independent fashion. Inspection of the vs plane suggests structures near and 4600 MeV.
- Received 17 January 2019
DOI:https://doi.org/10.1103/PhysRevLett.122.152002
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© 2019 CERN, for the LHCb Collaboration