Exclusive radiative and electroweak b → d and b → s penguin decays at NLO

M. Beneke, Th Feldmann, D. Seidel

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293 Scopus citations


We provide standard model expectations for the rare radiative decays B → Kz.astγ, B → ργ and B → ωγ, and the electroweak penguin decays B → K z.ast+- and B → ρℓ +- at the next-to-leading order (NLO), extending our previous results to b → d 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 b → d are mainly interesting in the search for new flavor-changing neutral current interactions, but in addition the B → ργ decays provide constraints on the CKM parameters (ρ̄, η̄). The potential impact of these constraints is discussed.

Original languageEnglish
Pages (from-to)173-188
Number of pages16
JournalEuropean Physical Journal C
Issue number2
StatePublished - May 2005
Externally publishedYes


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