Exclusive $D_s\to (\hat{I}\cdot ,\hat{I}{\cdot }^{\prime })l\hat{I}½$ decays in light cone QCD

Abstract

Probing the $\bar{s}s$ content of the $\hat{I}\cdot$ and $\hat{I}{\cdot }^{\prime }$ mesons and considering mixing between these states as well as gluonic contributions, the form factors responsible for semileptonic $D_s\to (\hat{I}\cdot ,\hat{I}{\cdot }^{\prime })l\hat{I}½$ 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.

13 Pages, 2 Figure and 4 Tables