Exclusive $D_{s} \to (\eta,\eta^{\prime}) l \nu$ decays in light cone QCD
| Autor: | Azizi, K., Khosravi, R., Falahati, F. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | J.Phys.G38:095001,2011 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0954-3899/38/9/095001 |
| Popis: | Probing the $\bar ss$ content of the $\eta$ and $\eta'$ mesons and considering mixing between these states as well as gluonic contributions, the form factors responsible for semileptonic $D_s \to (\eta, \eta') l \nu$ transitions are calculated via light cone QCD sum rules. Corresponding branching fractions and their ratio for different mixing angles are also obtained. Our results are in a good consistency with experimental data as well as predictions of other nonperturbative approaches. Comment: 13 Pages, 2 Figure and 4 Tables |
| Databáze: | arXiv |
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