Strong and Electromagnetic Decays of Two New $Lambd{a}_c^{\ast }$ Baryons

Abstract

Two recently discovered excited charm baryons are studied within the framework of Heavy Hadron Chiral Perturbation Theory. We interpret these new baryons which lie $308 \MeV$ and $340 \MeV$ above the ${\Lambda }_c$ as $I=0$ members of a P-wave spin doublet. Differential and total decay rates for their double pion transitions down to the ${\Lambda }_c$ ground state are calculated. Estimates for their radiative decay rates are also discussed. We find that the experimentally determined characteristics of the ${\Lambda }_c^{\ast }$ baryons may be simply understood in the effective theory.

16 pages with 4 figures not included but available upon request, CALT-68-1912

References in corpus (3)

• Corrections to Chiral Dynamics of Heavy Hadrons: SU(3) Symmetry Breaking, (with some minor corrections)
• Radiative Decays of the P-Wave Charmed Mesons
• Strong Decays of Strange Charmed P-Wave Mesons

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