The semi-leptonic form factors of $��_{b}\to��_{c}$ and $��_{b}\to��_{c}$ in QCD sum rules
| Autor: | Zhao, Zhen-Xing, Li, Run-Hui, Shen, Yue-Long, Shi, Yu-Ji, Yang, Yan-Sheng |
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| Rok vydání: | 2020 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2010.07150 |
| Popis: | In this work, the full leading order results of the form factors for $��_{b}\to��_{c}$ and $��_{b}\to��_{c}$ are obtained in QCD sum rules. Contributions from up to dim-5 have been considered. For completeness, we also study the two-point correlation function to obtain the pole residues of $��_{Q}$ and $��_{Q}$, and higher accuracy is achieved. For the three-point correlation function, since stable Borel regions can not be found, about $20\%$ uncertainties are introduced for the form factors of $��_{b}\to��_{c}$ and $��_{b}\to��_{c}$. Our results for the form factors are consistent with those of the Lattice QCD within errors. 17 pages, 5 figures |
| Databáze: | OpenAIRE |
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