Pion-assisted charmed dibaryon candidate

A. Gal, H. Garcilazo, A. Valcarce, T. Fernández-Caramés

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12 Scopus citations

Abstract

The Λc(2286)N system is studied in a chiral constituent quark model, and the resulting s-wave interaction is used in separable form within three-body models of the πΛcN system with quantum numbers (C,I,JP)=(+1,32,2+). Separable interactions are also used for the dominant p-wave pion-baryon channels dominated by the Δ(1232) and Σc(2520) resonances. Faddeev equations with relativistic kinematics are solved on the real axis to search for bound states and in the complex plane to search for three-body resonances. Some of the models considered generate a very narrow bound state, requiring isospin violation for its strong decay. Other models lead to a narrow resonance (Γ'0.4MeV) for a resonance mass below the Σc(2455)N threshold. This would be the lowest-lying C=+1 dibaryon, with mass estimated as ≈3370±15MeV.

Original languageEnglish
Article number014019
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume90
Issue number1
DOIs
StatePublished - 11 Jul 2014

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