Model-independent observation of exotic contributions to B0 → J/ψK+πdecays

LHCb Collaboration

Research output: Contribution to journalArticlepeer-review


An angular analysis of B0 → J/ψK+π decays is performed, using proton-proton collision data corresponding to an integrated luminosity of 3 fb1 collected with the LHCb detector. The m(K+π) spectrum is divided into fine bins. In each m(K+π) bin, the hypothesis that the three-dimensional angular distribution can be described by structures induced only by K resonances is examined, making minimal assumptions about the K+π system. The data reject the K-only hypothesis with a large significance, implying the observation of exotic contributions in a model-independent fashion. Inspection of the m(J/ψπ) versus m(K+π) plane suggests structures near m(J/ψπ) = 4200 MeV and 4600 MeV.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Jan 17 2019

ASJC Scopus subject areas

  • General

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