Three-Body Decay of ${\Lambda }_c^{\ast }(2595)$ and ${\Lambda }_c^{\ast }(2625)$ with Consideration of ${\Sigma }_c(2455)\pi$ and ${\Sigma }_c^{\ast }(2520)\pi$ in Intermediate States

Abstract

Three-body decay of charmed baryons ${\Lambda }_c^{\ast }(2595)$ and ${\Lambda }_c^{\ast }(2625)$ into ${\Lambda }_c\pi \pi$ are studied with effective Lagrangians in which the coupling constants are extracted from the non-relativistic quark model. We take into account sequential processes going through ${\Sigma }_c(2455)$ and ${\Sigma }_c^{\ast }(2520)$ in intermediate states. The total decay widths are sensitive to the coupling of ${\Lambda }_c^{\ast }$ with ${\Sigma }_c\pi$ open channel and to ${\Sigma }_c^{\ast }\pi$ closed channel. We find that ${\Lambda }_c^{\ast }(2595)$ and ${\Lambda }_c^{\ast }(2625)$ with $\lambda$ mode assignment can explain nicely the experimental data. We also show invariant mass distributions of ${\Lambda }_c^{\ast }(2595)$ and ${\Lambda }_c^{\ast }(2625)$ decays which are significantly different for various quark configurations.

9 pages, 9 figures

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• Charmed baryon strong decays in a chiral quark model
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• Structure of charmed baryons studied by pionic decays
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• Spectrum of singly heavy baryons from a chiral effective theory of diquarks
• The newly observed ${\Lambda }_b(6072{)}^0$ structure and its $\rho -$mode nonstrange partners
• Three-body decay of ${\Lambda }_c^{\ast }(2765)$ and determination of its spin-parity
• Three-Body Decay of ${\Lambda }_c^{\ast }(2595)$ and ${\Lambda }_c^{\ast }(2625)$ with the Inclusion of Direct Two-Pion Coupling
• Strong decays of singly heavy baryons from a chiral effective theory of diquarks
• Is the ${\Lambda }_c(2625{)}^{+}$ the heavy quark spin symmetry partner of the ${\Lambda }_c(2595{)}^{+}$?
• Chiral effective theory of scalar and vector diquarks revisited