Charmed baryon strong decays in a chiral quark model

Abstract

Charmed baryon strong decays are studied in a chiral quark model. The data for the decays of Λc+(2593), Λc+(2625), Σc++,+,0, and Σc+,0(2520) are accounted for successfully, which allows one to fix the pseudoscalar-meson-quark couplings in an effective chiral Lagrangian. Extending this framework to analyze the strong decays of the newly observed charmed baryons, we classify that Λc(2880) and Λc(2940) as D-wave states in the N=2 shell; Λc(2880) could be |ΛcDλλ232+ and Λc(2940) could be |ΛcDλλ252+. Our calculation also suggests that Λc(2765) is very likely a ρ-mode P-wave excited state in the N=1 shell, and favors a |ΛcPρ412- configuration. The Σc(2800) favors being a |ΣcPλ212- state. But its being |Σc++Pλ452- cannot be ruled out. © 2008 The American Physical Society.