تقرير
The $Z_{cs}$ states and the mixture of hadronic molecule and diquark-anti-diquark components within effective field theory
| العنوان: | The $Z_{cs}$ states and the mixture of hadronic molecule and diquark-anti-diquark components within effective field theory |
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| المؤلفون: | Cao, Ze-Hua, He, Wei, Sun, Zhi-Feng |
| سنة النشر: | 2022 |
| المجموعة: | High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology |
| الوصف: | In this work, we construct the Lagrangian describing meson-diquark interaction, such that the diquark-anti-diquark component as well as the molecular component is introduced when studying the $Z_{cs}$ states. In this way, the problem is solved that if only considering the $\bar{D}^{(*)}D_s^{(*)}$ components, the potentials are suppressed by OZI rule. Through solving the Bethe-Salpeter equation, we find that the $Z_{cs}(4000)^+$ can be explained as the mixture of $\bar{D}^{*0}D_s^+$ and $\bar{A}_{cs}S_{cu}$ components. Besides, for the $\bar{D}^{*0}D_s^{*+}/\bar{A}_{cs}A_{cu}$ system, the pole of $4208\pm 13i$ MeV on the second Riemann sheet is predicted, whose mass agrees with that of $Z_{cs}(4220)^+$ while the width is much smaller than $Z_{cs}(4220)^+$. Due to the large error of the $Z_{cs}(4220)^+$'s width, further measurements are expected. In addition, several other poles of different spins are predicted. Comment: 6 pages, 1 figure |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.107.014017 |
| URL الوصول: | http://arxiv.org/abs/2205.11150 |
| رقم الأكسشن: | edsarx.2205.11150 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.107.014017 |
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