Abstract
We first give a brief overview of the charmed baryon spectroscopy and discuss their possible structure and spin-parity assignments in the quark model. With the new Belle measurement of the widths of and and the recent CDF measurement of the strong decays of and , we give updated coupling constants in heavy hadron chiral perturbation theory. We find for -wave transitions between -wave and -wave baryons, and , one of the couplings responsible for -wave transitions between -wave and -wave baryons, is extracted from to be . It is substantially enhanced compared to the old value of order 0.437. With the help from the quark model, two of the couplings and responsible for -wave transitions between -wave and -wave baryons are determined from decays. There is a tension for the coupling as its value extracted from will imply and rates slightly above the current limits. It is conceivable that SU(3) flavor symmetry breaking can help account for the discrepancy.
- Received 25 August 2015
DOI:https://doi.org/10.1103/PhysRevD.92.074014
© 2015 American Physical Society