Rare decays $\bar{B}\to X_{s(d)}\gamma$ at the NLO

H. M. Asatrian, H. H. Asatryan, A. Hovhannisyan

We present an independent calculation of $\mathcal{O}({\alpha }_s)$ matrix elements of the QCD penguin operators for the decays $\bar{B}\to X_{s(d)}\gamma$. The Mellin-Barnes representation techn…