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Article Dans Une Revue Physical Review Letters Année : 2006

Exploring B_{d,s}-> KK decays through flavour symmetries and QCD-factorisation

Joaquim Matias
  • Fonction : Auteur
Javier Virto
  • Fonction : Auteur

Résumé

We present a new analysis of B_{d,s}->KK modes within the SM, relating them in a controlled way through SU(3)-flavour symmetry and QCD-improved factorisation. We propose a set of sum rules for B_{d,s}-> K^0{\bar K}^0 observables. We determine B_s-> KK branching ratios and CP-asymmetries as functions of A_{dir}(B_d-> K^0{\bar K}^0), pointing out a conflict between BR(B_s-> K+K-) in the SM and data. Finally, we predict the amount of U-spin breaking between B_d-> pi+pi- and B_s-> K+K-.

Dates et versions

hal-00022256 , version 1 (05-04-2006)

Identifiants

Citer

Sebastien Descotes-Genon, Joaquim Matias, Javier Virto. Exploring B_{d,s}-> KK decays through flavour symmetries and QCD-factorisation. Physical Review Letters, 2006, 97, pp.061001. ⟨10.1103/PhysRevLett.97.061801⟩. ⟨hal-00022256⟩
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