P<sub>c</sub> pentaquarks with chiral tensor and quark dynamics
We investigate the hidden-charm pentaquarks as superpositions of Λ<sub>c</sub>͞D⁽*⁾ ðÞ and Σ<sub>c</sub>⁽*⁾͞D⁽*⁾(isospin I = 1/2) meson-baryon channels coupled to a uudc͞c compact core by employing an interaction satisfying the heavy quark and chiral symmetries. Our model can...
Guardado en:
| Autores principales: | , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2020
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/146428 |
| Aporte de: |
| Sumario: | We investigate the hidden-charm pentaquarks as superpositions of Λ<sub>c</sub>͞D⁽*⁾ ðÞ and Σ<sub>c</sub>⁽*⁾͞D⁽*⁾(isospin I = 1/2) meson-baryon channels coupled to a uudc͞c compact core by employing an interaction satisfying the heavy quark and chiral symmetries. Our model can consistently explain the masses and decay widths of P<sub>c</sub>⁺(4312), P<sub>c</sub>⁺(4440) and P<sub>c</sub>⁺(4457) with the dominant components of Σ<sub>c</sub>͞D and Σ<sub>c</sub>͞D* with spin-parity assignments Jᴾ =1/2⁻, 3/2⁻ and 1/2⁻, respectively. We analyze basic properties of the P<sub>c</sub>’s such as masses and decay widths, and find that the mass ordering is dominantly determined by the quark dynamics while the decay widths by the tensor force of the one-pion exchange. |
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