B -> Xs l+ l- in the Standard Model and in Two-Higgs-Doublet Models
Abstract
We present recent results of the rare semileptonic decay B -> Xs l+ l-. We particularly focus on higher order electroweak corrections in the Standard Model (SM) as well as O(alphas) corrections in Two-Higgs-doublet models (THDM), both of which are computed within an effective field theory approach. The calculation of higher order electroweak corrections reveals the presence of enhanced electromagnetic logarithms log(mb2/ml2) in the differential branching ratio. The inclusion of O(alphas) in the THDM reduces the scale dependence of the corresponding Wilson coefficients significantly.
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