Pion-nucleon scattering with decuplet contribution in heavy baryon SU(3) chiral perturbation theory
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909424175546368 |
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| author | Ou-Yang, Jing Huang, Bo-Lin |
| author_facet | Ou-Yang, Jing Huang, Bo-Lin |
| contents | We calculate the complete $T$ matrices with decuplet contributions for pion-nucleon scattering to order $\mathcal{O}(ε^3)$ in heavy baryon SU(3) chiral perturbation theory. The baryon mass in the chiral limit $M_0$ and the low-energy constants are determined by fitting to phase shifts of $πN$, the experimental octet-baryon masses, and the value of $σ_{πN}$ simultaneously. By using these constants, we obtain the $KN$ $σ$ terms, $σ_{KN}^{(1)}=(375.07\pm33.02)$ MeV and $σ_{KN}^{(2)}=(275.32\pm32.24)$ MeV, with the errors being only statistical. An excellent description of the phase shifts is obtained for all partial waves. We also present results for scattering lengths and scattering volumes. In addition, the convergence of the approach is also discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_09388 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pion-nucleon scattering with decuplet contribution in heavy baryon SU(3) chiral perturbation theory Ou-Yang, Jing Huang, Bo-Lin Nuclear Theory High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Experiment We calculate the complete $T$ matrices with decuplet contributions for pion-nucleon scattering to order $\mathcal{O}(ε^3)$ in heavy baryon SU(3) chiral perturbation theory. The baryon mass in the chiral limit $M_0$ and the low-energy constants are determined by fitting to phase shifts of $πN$, the experimental octet-baryon masses, and the value of $σ_{πN}$ simultaneously. By using these constants, we obtain the $KN$ $σ$ terms, $σ_{KN}^{(1)}=(375.07\pm33.02)$ MeV and $σ_{KN}^{(2)}=(275.32\pm32.24)$ MeV, with the errors being only statistical. An excellent description of the phase shifts is obtained for all partial waves. We also present results for scattering lengths and scattering volumes. In addition, the convergence of the approach is also discussed. |
| title | Pion-nucleon scattering with decuplet contribution in heavy baryon SU(3) chiral perturbation theory |
| topic | Nuclear Theory High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2409.09388 |