Quark model description of the \Lambda_c(2940)^+ as a molecular D^*N state and the possible existence of the \Lambda_b(6248)

D. R. Entem; F. Fern\'andez; P. G. Ortega

arxiv: 1210.2633 · v1 · pith:UFNH52RQnew · submitted 2012-10-09 · ✦ hep-ph · nucl-th

Quark model description of the Λ_c(2940)^+ as a molecular D^*N state and the possible existence of the Λ_b(6248)

P. G. Ortega , D. R. Entem , F. Fern\'andez This is my paper

classification ✦ hep-ph nucl-th

keywords lambdastatemodelmolecularquarkadditionallybaryonbinding

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The \Lambda_c(2940)^+ baryon is studied in a constituent quark model as a molecular state composed by nucleons and D^* mesons. A bound state with the right binding energy is found for the J^\pi=3/2^- channel. The partial widths \Lambda_c(2940)^+\to ND and \Lambda_c(2940)^+\to \Sigma_c \pi are calculated and the results are consistent with the experimental data. Additionally a bottom partner \bar B^*N is predicted with a mass of 6248 MeV/c^2.

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