Abstract
Single-particle energies of the charmed baryon are obtained in several nuclei from the relevant self-energy constructed within the framework of a perturbative many-body approach. Results are presented for a charmed baryon-nucleon () potential based on a SU(4) extension of the meson-exchange hyperon-nucleon potential of the Jülich group. Three different models (A, B, and C) of this interaction, which differ only on the values of the couplings of the scalar meson with the charmed baryons, are considered. Phase shifts, scattering lengths, and effective ranges are computed for the three models and compared with those predicted by the interaction derived by Haidenbauer and Krein [Eur. Phys. A 54, 199 (2018)] from the extrapolation to the physical pion mass of recent results of the HAL QCD Collaboration. Qualitative agreement is found for two of the models (B and C) considered. Our results for nuclei are compatible with those obtained by other authors based on different models and methods. We find a small spin-orbit splitting of the -, -, and -wave states as in the case of single hypernuclei. The level spacing of single-particle energies is found to be smaller than that of the corresponding one for hypernuclei. The role of the Coulomb potential and the effect of the coupling of the and channels on the single-particle properties of nuclei are also analyzed. Our results show that, despite the Coulomb repulsion between the and the protons, even the less attractive one of our models (model C) is able to bind the in all the nuclei considered. The effect of the coupling is found to be almost negligible due to the large mass difference of the and baryons.
- Received 28 January 2019
- Revised 21 March 2019
DOI:https://doi.org/10.1103/PhysRevC.99.045208
©2019 American Physical Society