TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2016
DA  - 2016//
TI  - Evidence for Exotic Hadron Contributions to Lambda(0)(b) -> J/psi p pi(-) Decays
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 082003
EP  - 10pp
VL  - 117
IS  - 8
PB  - Amer Physical Soc
AB  - 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.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1606.06999
UR  - https://doi.org/10.1103/PhysRevLett.117.082003
DO  - 10.1103/PhysRevLett.117.082003
LA  - English
N1  - WOS:000381608500004
ID  - LHCbCollaborationAaij_etal2016
ER  -