Specific three-loop contributions to $b\to s\gamma$ associated with the current-current operators

Christoph Greub, Hrachia M. Asatrian, Francesco Saturnino +1

We work out a specific class of three-loop diagrams (of order ${\alpha }_s^2$) contributing to the decay amplitude for $b\to s\gamma$ associated with the current-current operators $O_1$ and $…