1307.2797 (N. Offen et al.)

Light-Cone Sum Rules for the $D_{\left(s\right)}\rightarrow
η^{\left(\prime\right)} l ν_{l}$ Form Factor    [PDF]

N. Offen, F. A. Porkert, A. Schaefer

We present an improved light-cone sum rule analysis of the decay form factors of $D$ and $D_s$ into $\eta$ and $\eta^{\prime}$ and argue that these decays offer a very promissing possibility to determine the leading Fock-state gluonic contribution of the $\eta'$, e.g., at a future FAIR facility. We also give the corresponding branching ratios for B decays.

View original: http://arxiv.org/abs/1307.2797