@Article{LHCbCollaborationAaij_etal2020,
author="LHCb Collaboration (Aaij, R. et al
and Garcia Martin, L. M.
and Henry, L.
and Jashal, B. K.
and Martinez-Vidal, F.
and Oyanguren, A.
and Remon Alepuz, C.
and Ruiz Vidal, J.
and Sanchez Mayordomo, C.",
title="First observation of the decay Lambda(0)(b) -> eta(c) (1S)pK(-)",
journal="Physical Review D",
year="2020",
publisher="Amer Physical Soc",
volume="102",
number="11",
pages="112012--12pp",
abstract="The decay Lambda(0)(b) -> eta(c) (1S)pK(- )is observed for the first time using a data sample of proton-proton collisions, corresponding to an integrated luminosity of 5.5 fb I, collected with the LHCb experiment at a center-of-mass energy of 13 TeV. The branching fraction of the decay is measured, using the Lambda(0)(b) -> J/psi pK(-) decay as a normalization mode, to be B(Lambda(0)(b) -> eta(c) (1S)pK(-)) = (1.06 +/- 0.16 +/- 0.06(-019)(+0.22)) x 10(-4), where the quoted uncertainties are statistical, systematic and due to external inputs, respectively. A study of the eta(c)(1S)p mass spectrum is performed to search for the P-c(4312)(+) pentaquark state. No evidence is B(Lambda(0)(b) -> P-c(4312)K-+(-))xB(P-c(4312)(+)-> eta(c)(1S)p)/B(Lambda(0)(b) -> eta(c) (1S)pK(-)) < 0.24( ) observed and an upper limit of < 0.24 is obtained at the 95{\%} confidence level.",
optnote="WOS:000600840000002",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4660), last updated on Wed, 13 Jan 2021 08:55:52 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.102.112012",
opturl="https://arxiv.org/abs/2007.11292",
opturl="https://doi.org/10.1103/PhysRevD.102.112012",
language="English"
}