Complete gluon bremsstrahlung corrections to the process b → s l + l − ∗

Forward – Backward Asymmetry in B → X s l + l − at the NNLL Level

We report the results of a new calculation of soft-gluon corrections in B → Xsll decays. In particular, we present the first calculation of bremsstrahlung and corresponding virtual terms to the lepton forward–backward asymmetry, which allows us to systematically include all contributions to this observable beyond the lowest non-trivial order. The new terms are important, for instance the positi...

Bremsstrahlung Corrections to the Decay B ! Ss

We calculate the O(s) gluon Bremsstrahlung corrections to the inclusive decay b ! ss, involving the full operator basis ^ O 1 { ^ O 8. Connrming and extending earlier calculations of Ali and Greub, we give formulas for the total decay width as well as the perturbative photon spectrum, regarding the former as a necessary part of the forthcoming complete NLO analysis. We explore in detail the ren...

Complete bremsstrahlung corrections to the forward - backward asymmetries in b → X s l + l −

Bremsstrahlung corrections to the decay b → sγ

We calculate the O(αs) gluon Bremsstrahlung corrections to the inclusive decay b → sγ, involving the full operator basis Ô1 – Ô8. Confirming and extending earlier calculations of Ali and Greub, we give formulas for the total decay width as well as the perturbative photon spectrum, regarding the former as a necessary part of the forthcoming complete NLO analysis. We explore in detail the renorma...

Results of the O ( α s ) two - loop virtual corrections to B → X s l + l − in the standard model

We present the results of the O(αs) two-loop virtual corrections to the differential decay width dΓ(B → Xsll)/dŝ, where ŝ is the invariant mass squared of the lepton pair, normalized to m b . Those contributions from gluon bremsstrahlung which are needed to cancel infrared and collinear singularities are also included. Our calculation is restricted to the range 0.05 ≤ ŝ ≤ 0.25 where the effects...