@Article{LHCbCollaborationAaij_etal2016,
author="LHCb Collaboration (Aaij, R. et al
and Martinez-Vidal, F.
and Oyanguren, A.
and Remon Alepuz, C.
and Ruiz Valls, P.
and Sanchez Mayordomo, C.",
title="Evidence for Exotic Hadron Contributions to Lambda(0)(b) -> J/psi p pi(-) Decays",
journal="Physical Review Letters",
year="2016",
publisher="Amer Physical Soc",
volume="117",
number="8",
pages="082003--10pp",
abstract="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.",
optnote="WOS:000381608500004",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2770), last updated on Fri, 09 Sep 2016 11:16:04 +0000",
issn="0031-9007",
doi="10.1103/PhysRevLett.117.082003",
opturl="http://arxiv.org/abs/1606.06999",
opturl="https://doi.org/10.1103/PhysRevLett.117.082003",
archivePrefix="arXiv",
eprint="1606.06999",
language="English"
}