Two-loop virtual QCD correction to the B -> X_s l+l- decay
Abstract
Description
I discuss an application of numerical techniques for massive two-loop Feynman diagram evaluation to a phenomenologically very important rare decay process, B -> X_s l+l-. This process, currently being measured at B factories, has been calculated at two-loop level in the lower dilepton invariant mass perturbative window by a previous collaboration. We extended this result, by using numerical integration methods, to the whole observable spectrum of the dilepton invariant mass consistent with the perturbative QCD regime.
Talk presented at the Moriond 2003 conference
Talk presented at the Moriond 2003 conference