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In this publication electroweak next-to-leading order corrections tosemileptonic B-meson decays into (pseudo)scalar final states are presented. Tothis end, these corrections of O(alpha G_F) have been calculated in theQED-enhanced phenomenological model, incorporating the bound-state mesons asits degrees of freedom, and matched to a similar calculation on the level ofconstituent partons in the full Standard Model. Consequently, the effectsarising due to corrections of the partial decay widths on the extraction of theCKM matrix elements |V_cb| and |V_ub| are detailed. Further, the results of twoindependent Monte-Carlo implementations are presented: One is the dedicated,strict fixed-order generator BLOR, and the other is embedded into the genericYennie-Frautschi-Suura-type resummation of Photons++, which is part of themulti-purpose event generator Sherpa. The resulting distributions are comparedagainst the standard tool used in many experimental analyses, PHOTOS, showingimprovements on the shapes of kinematic distributions of both the lepton andthe final state meson.

Comparing different ansatzes to describe electroweak radiative  corrections to exclusive semileptonic B meson decays into (pseudo)scalar  final state mesons using Monte-Carlo techniques