Chromopolarizability of charm-beauty quarkonium from $B_c(2S) \rightarrow B_c\pi\pi$ transition
| Autor: | Chen, Yun-Hua, Li, Zi-Wei |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The chromopolarizability of a charm-beauty quarkonium describes its interaction with soft gluonic fields and can be measured in the heavy quarkonium decays. Using the dispersion theory which consider the $\pi\pi$ final state interaction model-independently, we analyze the transition $B_c(2S) \rightarrow B_c\pi^+\pi^-$ and obtain the chromopolarizability $\alpha_{B_c(2S) B_c}=0.66\pm 0.25$ and the parameter $\kappa =-0.02\pm 0.13$. It is found that the transitional chromopolarizability of the $c\bar{b}$ state is intermediate between the transitional chromopolarizabilities of the $c\bar{c}$ and $b\bar{b}$ states. Our results could be useful in studying the interactions of charm-beauty quarkonium with light hadrons. Comment: 11 pages, 2 figures |
| Databáze: | arXiv |
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