@Article{Xie+Oset2019,
author="Xie, J. J.
and Oset, E.",
title="Search for the Sigma* state in Lambda(+)(c) -> pi(+)pi(0)pi(-)Sigma(+) decay by triangle singularity",
journal="Physics Letters B",
year="2019",
publisher="Elsevier Science Bv",
volume="792",
pages="450--453",
abstract="A Sigma* resonance with spin-parity J(P) = 1/2(-) and mass in the vicinity of the (K) over barN threshold has been predicted in the unitary chiral approach and inferred from the analysis of CLAS data on the gamma p -> K+pi(0)Sigma(0) reaction. In this work, based on the dominant Cabibbo favored weak decay mechanism, we perform a study of Lambda(+)(c) -> pi(+)pi(0)Sigma* with the possible Sigma* state decaying into pi(-)Sigma(+) through a triangle diagram. This process is initiated by Lambda(+)(c) -> pi(+)(K) over bar *N, then the (K) over bar* decays into (K) over bar pi and (K) over barN produce the Sigma* through a triangle loop containing (K) over bar *N (K) over bar which develops a triangle singularity. We show that the pi(-)Sigma(+) state is generated from final state interaction of (K) over barN in S-wave and isospin I = 1, and the Lambda(+)(c) -> pi(+)pi(0)pi(-)Sigma(+) decay can be used to study the possible Sigma* state around the (K) over barN threshold. The proposed decay mechanism can provide valuable information on the nature of the Sigma* resonance and can in principle be tested by facilities such as LHCb, BelleII and BESIII.",
optnote="WOS:000466802100064",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3999), last updated on Fri, 17 May 2019 08:54:51 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2019.04.011",
opturl="https://arxiv.org/abs/1811.07247",
opturl="https://doi.org/10.1016/j.physletb.2019.04.011",
language="English"
}