تقرير
Radiative decays of X(3872) discriminate between the molecular and compact interpretations
| العنوان: | Radiative decays of X(3872) discriminate between the molecular and compact interpretations |
|---|---|
| المؤلفون: | Grinstein, B., Maiani, L., Polosa, A. D. |
| سنة النشر: | 2024 |
| المجموعة: | High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology |
| الوصف: | Radiative decays X --> psi(1S) + gamma and X --> psi(2S) + gamma might be expected to have a ratio of branching fractions following the phase space volumes ratio. However data suggest the opposite, indicating a value for R=B(X --> psi^prime + gamma) / B(X --> psi +gamma) consistently larger than one. In this paper we present a calculation of R for both a compact Born-Oppenheimer cc-bar q-qbar state and a DD^* molecule. In the former case R~1 or larger is found, a value to be confronted with forthcoming high statistics data analyses. In the molecular picture, with D and D^* mesons described by the universal wave function used by Voloshin, Braaten and Kusunoki, we find that R would be of order 10^-2. A more precise experimental measure would be extremely helpful in clarifying the true nature of the X(3872). Comment: 12 pages, 9 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2401.11623 |
| رقم الأكسشن: | edsarx.2401.11623 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |