@Article{Wang_etal2016,
author="Wang, E.
and Chen, H. X.
and Geng, L. S.
and Li, D. M.
and Oset, E.",
title="Hidden-charm pentaquark state in Lambda(0)(b) -> J/psi p pi(-) decay",
journal="Physical Review D",
year="2016",
publisher="Amer Physical Soc",
volume="93",
number="9",
pages="094001--10pp",
abstract="We study here the A(b)(0) -> J/psi p pi(-) reaction in analogy to the A(b)(0) -> J/psi pK(-) one, and we note that in both decays there is a sharp structure (dip or peak) in the J/psi p mass distribution around 4450 MeV, which is associated in the A(b)(0) -> J/psi pK(-) experiment to an exotic pentaquark baryonic state, although in J/psi p pi(-) it shows up with relatively low statistics. We analyze the A(b)(0) -> J/psi p pi(-) interaction along the same lines as the A(b)(0) -> J/psi pK(-) one, with the main difference stemming from the reduced Cabibbo strength in the former and the consideration of the pi(-)p final state interaction instead of the K(-)p one. We find that with a minimal input, introducing the pi(-)p and J/psi p interaction in S-wave with realistic interactions, and the empirical P-wave and D-wave contributions, one can accomplish a qualitative description of the pi(-)p and J/psi p mass distributions. More importantly, the peak structure followed by a dip of the experimental J/psi p mass distribution is reproduced with the same input as used to describe the data of A(b)(0) -> J/psi pK(-) reaction. The repercussion for the triangular singularity mechanism, invoked in some works to explain the pentaquark peak, is discussed.",
optnote="WOS:000375655000003",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2668), last updated on Thu, 05 Dec 2019 22:32:38 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.93.094001",
opturl="http://arxiv.org/abs/1512.01959",
opturl="https://doi.org/10.1103/PhysRevD.93.094001",
archivePrefix="arXiv",
eprint="1512.01959",
language="English"
}