تقرير
The $\phi p$ bound state in the unitary coupled-channel approximation
| العنوان: | The $\phi p$ bound state in the unitary coupled-channel approximation |
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| المؤلفون: | Sun, Bao-Xi, Fan, Ying-Ying, Cao, Qin-Qin |
| المصدر: | Commun. Theor. Phys. 75 (2023) 055301 |
| سنة النشر: | 2022 |
| المجموعة: | High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology |
| الوصف: | The strong attractive interaction of the $\phi$ meson and the proton is reported by ALICE collaboration recently. The corresponding scattering length $f_0$ is given as $Re(f_0)=0.85\pm0.34(stat)\pm0.14(syst)$fm and $Im(f_0)=0.16\pm0.10(stat)\pm0.09(syst)$fm. The fact that the real part is significant in contrast to the imaginary part indicates a dominate role of the elastic scattering, whereas the inelastic process is less important. In this work, such scattering processes are inspected based on a unitary coupled-channel approach inspired by Bethe-Salpeter equation. The $\phi p$ scattering length is calculated based on this approach, and it is found that the experimental value of the $\phi p$ scattering length can be obtained only if the attractive interaction of the $\phi$ meson and the proton is taken into account. A significant outcome of such attractive interaction is a two-pole structure in the $\phi p$ scattering amplitude. One of the pole, locating at $(1969-i283)$~MeV might correspond to $N(1895)1/2^-$ or $N(1875)3/2^-$ listed in the review of the Particle Data Group(PDG). The other one, locating at ${1949-i3}$~MeV should be a $\phi N$ bound state, which has no counterpart in the PDG data. Comment: 9 pages, 2 figures and 4 tables. To be published in Communications in Theoretical Physics |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1572-9494/acc31d |
| URL الوصول: | http://arxiv.org/abs/2206.02961 |
| رقم الأكسشن: | edsarx.2206.02961 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1572-9494/acc31d |
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