https://doi.org/10.1140/epjc/s2005-02181-5
theoretical physics
Exclusive radiative and electroweak 
and 
penguin decays at NLO
1
Institut für Theoretische Physik E, RWTH Aachen, 52056, Aachen, Germany
2
Theoretische Physik 1, Fachbereich Physik, Universität Siegen, 57068, Siegen, Germany
* e-mail: feldmann@hep.physik.uni-siegen.de
We provide standard model expectations for the rare radiative decays 
, 
and 
, and the electroweak penguin decays 
and 
at the next-to-leading order (NLO), extending our previous results to transitions. We consider branching fractions, isospin asymmetries and direct CP asymmetries. For the electroweak penguin decays, the lepton-invariant mass spectrum and forward-backward asymmetry is also included. Radiative and electroweak penguin transitions in are mainly interesting in the search for new flavor-changing neutral current interactions, but in addition the decays provide constraints on the CKM parameters 
. The potential impact of these constraints is discussed.
© Springer-Verlag, 2005
