TY - JOUR
T1 - Pion-assisted charmed dibaryon candidate
AU - Gal, A.
AU - Garcilazo, H.
AU - Valcarce, A.
AU - Fernández-Caramés, T.
PY - 2014/7/11
Y1 - 2014/7/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84904302771&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.90.014019
DO - 10.1103/PhysRevD.90.014019
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AN - SCOPUS:84904302771
SN - 1550-7998
VL - 90
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 1
M1 - 014019
ER -