Analytic two-loop virtual corrections to $b-->d{l}^{+}{l}^{-}$

Abstract

We compute the two-loop virtual corrections to the flavour changing neutral current process $b-->d{l}^{+}{l}^{-}$. As calculation techniques integration by parts identities and the method of differential equations are used. The result is presented in closed form as a function of $q^2/m_b^2$, where $q^2$ is the invariant mass of the lepton pair and $m_b$ is the b-quark mass.

Comments: 19 pages, 3 figures. Minor modifications, references added