Model-Independent Observation of Exotic Contributions to <i>B</i>° → <i>J</i>/ψ<i>K</i><SUP>+</SUP>π<SUP>-</SUP> Decays

Aaij, R, Abellan Beteta, C, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F
et al (show 833 more authors) (2019) Model-Independent Observation of Exotic Contributions to <i>B</i>° → <i>J</i>/ψ<i>K</i><SUP>+</SUP>π<SUP>-</SUP> Decays. PHYSICAL REVIEW LETTERS, 122 (15). 152002-.

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An angular analysis of B^{0}→J/ψK^{+}π^{-} decays is performed, using proton-proton collision data corresponding to an integrated luminosity of 3  fb^{-1} 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^{-}) vs m(K^{+}π^{-}) plane suggests structures near m(J/ψπ^{-})=4200 and 4600 MeV.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 08 May 2019 09:42
Last Modified: 11 Oct 2023 05:28
DOI: 10.1103/PhysRevLett.122.152002
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