Pion-assisted charmed dibaryon candidate

Abstract

The Lambda_c(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 pi-Lambda_c-N system with quantum numbers (C,I,JP)=(+1,3/2,2+). Separable interactions are also used for the dominant p-wave pion-baryon channels dominated by the Delta(1232) and Sigma_c(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 (Gamma < 0.4 MeV) for resonance mass below the Sigma_c(2455)-N threshold. This would be the lowest-lying C=+1 dibaryon, with mass estimated approximately as 3370+/-15 MeV.

arXiv comment12 pages, 2 figures, 4 tables, v2--corrected typos and references, to be published in Phys. Rev. D

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Cited by in corpus (9)

• On the History of Dibaryons and their Final Observation
• Heavy Hadrons in Nuclear Matter
• ${\Lambda }_{c}N$ interaction from lattice QCD and its application to ${\Lambda }_c$ hypernuclei
• A model of charmed baryon-nucleon potential and 2- and 3-body bound states with charmed baryon
• Scattering of charmed baryons on nucleons
• Resonance in the $Y_{c}N$ potential model
• MESON2016 -- Concluding Remarks
• Exotic Heavy Hadrons
• Pauli principle forbids ${\Omega }_{QQQ}{\Omega }_{QQQ}{\Omega }_{QQQ}$ bound states