تقرير
The leptonic widths of high $\psi$-resonances in unitary coupled-channel model
| العنوان: | The leptonic widths of high $\psi$-resonances in unitary coupled-channel model |
|---|---|
| المؤلفون: | Badalian, A. M., Bakker, B. L. G. |
| المصدر: | Phys. Rev. D 96, 014030 (2017) |
| سنة النشر: | 2017 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | The leptonic widths of high $\psi$-resonances are calculated in a coupled-channel model with unitary inelasticity, where analytical expressions for mixing angles between $(n+1)\,^3S_1$ and $n\,^3D_1$ states and probabilities $Z_i$ of the $c\bar c$ component are derived. Since these factors depend on energy (mass), different values of mixing angles $\theta(\psi(4040))=27.7^\circ$ and $\theta(\psi(4160))=29.5^\circ$, $Z_1\,(\psi(4040))=0.76$, and $Z_2\,(\psi(4160))=0.62$ are obtained. It gives the leptonic widths $\Gamma_{ee}(\psi(4040))=Z_1\, 1.17=0.89$~keV, $\Gamma_{ee}(\psi(4160))=Z_2\, 0.76=0.47$~keV in good agreement with experiment. For $\psi(4415)$ the leptonic width $\Gamma_{ee}(\psi(4415))=~0.55$~keV is calculated, while for the missing resonance $\psi(4510)$ we predict $M(\psi(4500))=(4515\pm 5)$~MeV and $\Gamma_{ee}(\psi(4510)) \cong 0.50$~keV. Comment: 10 pages, 6 references corrected, some new material added |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.96.014030 |
| URL الوصول: | http://arxiv.org/abs/1702.06374 |
| رقم الأكسشن: | edsarx.1702.06374 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.96.014030 |
|---|