%0 Journal Article
%T Model-Independent Observation of Exotic Contributions to B degrees -> J/psi K+pi(-) Decays
%A LHCb Collaboration (Aaij, R. et al
%A Garcia Martin, L. M.
%A Henry, L.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%A Sanchez Mayordomo, C.
%J Physical Review Letters
%D 2019
%V 122
%N 15
%I Amer Physical Soc
%@ 0031-9007
%G English
%F LHCbCollaborationAaij_etal2019
%O WOS:000465181700002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3988), last updated on Wed, 01 May 2019 14:06:27 +0000
%X An angular analysis of B degrees -> J/psi K+pi(-) 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+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* resonances is examined, making minimal assumptions about the K+pi(-) 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/psi pi(-)) vs m(K+pi(-)) plane suggests structures near m(J/psi pi(-)) = 4200 and 4600 MeV.
%R 10.1103/PhysRevLett.122.152002
%U https://arxiv.org/abs/1901.05745
%U https://doi.org/10.1103/PhysRevLett.122.152002
%P 152002 - 10pp