%0 Journal Article
%T Evidence for Exotic Hadron Contributions to Lambda(0)(b) -> J/psi p pi(-) Decays
%A LHCb Collaboration (Aaij, R. et al
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Valls, P.
%A Sanchez Mayordomo, C.
%J Physical Review Letters
%D 2016
%V 117
%N 8
%I Amer Physical Soc
%@ 0031-9007
%G English
%F LHCbCollaborationAaij_etal2016
%O WOS:000381608500004
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2770), last updated on Fri, 09 Sep 2016 11:16:04 +0000
%X A full amplitude analysis of Lambda(0)(b) -> J/psi pi(-) decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb(-1). A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N -> p pi(-), either the P-c(43800)(+) and P-c(4450)(+) -> J/psi p states, previously observed in Lambda(0)(b) -> J/psi pK(-) decays, or the Z(c)(4200)(-) -> J/psi pi(-) state, previously reported in B-0 -> J/psi K+pi(-) decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the P-c(4380)(+) and P-c(4 450)(+) production rates expected from their previous observation taking account of Cabibbo suppression.
%R 10.1103/PhysRevLett.117.082003
%U http://arxiv.org/abs/1606.06999
%U https://doi.org/10.1103/PhysRevLett.117.082003
%P 082003-10pp