Model-independent observation of exotic contributions to $B^0\to J/\psi K^{+}{\pi }^{-}$ decays

Abstract

An angular analysis of $B^0\to J/\psi K^{+}{\pi }^{-}$ decays is performed, using proton-proton collision data corresponding to an integrated luminosity of 3~${\mathrm{fb}}^{-1}$ collected with the LHCb detector. The $m(K^{+}{\pi }^{-})$ spectrum is divided into fine bins. In each $m(K^{+}{\pi }^{-})$ bin, the hypothesis that the three-dimensional angular distribution can be described by structures induced only by $K^{\ast }$ resonances is examined, making minimal assumptions about the $K^{+}{\pi }^{-}$ system. The data reject the $K^{\ast }$-only hypothesis with a large significance, implying the observation of exotic contributions in a model-independent fashion. Inspection of the $m(J/\psi {\pi }^{-})$ versus $m(K^{+}{\pi }^{-})$ plane suggests structures near $m(J/\psi {\pi }^{-})=4200$~MeV and 4600~MeV.

All figures and tables, along with any supplementary material and additional information, are available at http://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-043.html

References in corpus (7)

• PYTHIA 6.4 Physics and Manual
• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Observation of the resonant character of the $Z(4430{)}^{-}$ state
• Observation of a new charged charmoniumlike state in B -> J/psi K pi decays
• A New Picture for the Formation and Decay of the Exotic $XYZ$ Mesons
• Differential branching fraction and angular moments analysis of the decay $B^0\to K^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ in the $K_{0,2}^{\ast }(1430{)}^0$ region
• Angular analyses of exclusive $\overline{B}\to X_J{\ell }_1{\ell }_2$ decays for spin $J\le 4$

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