====== TTP07-36 Towards NNLO Accuracy in the QCD Sum Rule for the Kaon Distribution Amplitude ======
 
 
   <hidden TTP07-36  Towards NNLO Accuracy in the QCD Sum Rule for the Kaon Distribution Amplitude > We calculate the $O(\alpha_s)$ and $O(\alpha_s^2)$ gluon radiative corrections
 to the QCD sum rule for the first Gegenbauer moment $a_1^K$ of the kaon
 light-cone distribution amplitude. The NNL0 accuracy is achieved for the
 perturbative term and quark-condensate contributions to the sum rule. A
 complete factorization is implemented, removing logarithms of $s$-quark mass
 from the coefficients in the operator-product expansion. The sum rule with
 radiative corrections yields $a_1^K(1 \GeV)=0.10\pm 0.04$.
 </hidden>
|**K.G. Chetyrkin, A. Khodjamirian, A.A. Pivovarov**  | 
|**  Phys.Lett.  B661 250-258 2008  **  |
| {{preprints:2007:ttp07-36.pdf|PDF}} {{preprints:2007:ttp07-36.ps|PostScript}} [[http://arxiv.org/abs/0712.2999|arXiv]]   |
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