Report
Strong decays of higher charmonium states into open-charm meson pairs
| العنوان: | Strong decays of higher charmonium states into open-charm meson pairs |
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| المؤلفون: | Gui, Long-Cheng, Lu, Long-Sheng, Lü, Qi-Fang, Zhong, Xian-Hui, Zhao, Qiang |
| المصدر: | Phys. Rev. D 98, 016010 (2018) |
| سنة النشر: | 2018 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | The open-charm strong decays of higher charmonium states up to the mass of the $6P$ multiplet are systematically studied in the $^3P_0$ model. The wave functions of the initial charmonium states are calculated in the linear potential (LP) and screened potential (SP) quark model. The decay widths for most of the well-established charmonium states above the open-charm thresholds can be reasonably described. By comparing our quark model calculations with the experimental observations we also discuss the nature of some of the newly observed charmonium-like states. It is found that (i) the $\psi(4415)$ may favor the $\psi(4S)$ or $\psi_1(3D)$ assignment. There may exist two highly overlapping vector charmonium states around 4.4 GeV; (ii) In the LP model the $J^{PC}=1^{--}$ $Y(4660)$ resonance and the $J^{PC}=0^{++}$ $X(4500)$ resonance may be assigned as the $\psi(5S)$ and $\chi_{c0}(4P)$, respectively; (iii) The newly observed state $X^*(3860)$ can be assigned as the $\chi_{c0}(2P)$ state with a narrow width of about $30$ MeV; (iv) It seems to be difficult to accommodate the $X(4140)$ and $X(4274)$ states in the same potential model as excited $\chi_{c1}$ states. (v) The $X(3940)$ resonance can be assigned as the $\eta_c(3S)$ state; (vi) The vector charmonium-like states $Y(4230/4260,4360)$ and scalar $X(4700)$ cannot be described by any conventional charmonium states self-consistently in our model. Comment: 20 pages, 2 figure, and 9 tables, published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.98.016010 |
| URL الوصول: | http://arxiv.org/abs/1801.08791 |
| رقم الانضمام: | edsarx.1801.08791 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.98.016010 |
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