Exclusive D-s -> (eta, eta ')l nu decays in light-cone QCD
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KünyeAZİZİ, K., KHOSRAVI, R., FALAHATI, F. (2011). Exclusive D-s -> (eta, eta ')l nu decays in light-cone QCD. Journal of Physics G: Nuclear and Particle Physics, 38 (9), pp. 1-9. http://dx.doi.org/10.1088/0954-3899/38/9/095001.
Probing the (s) over bars 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 -> (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.