Exploring Bd,s→KK decays through flavor symmetries and QCD factorization

Sébastien Descotes-Genon; Joaquim Matias; Javier Virto

doi:https://doi.org/10.1103/PhysRevLett.97.061801

Exploring Bd,s→KK decays through flavor symmetries and QCD factorization

Sébastien Descotes-Genon, Joaquim Matias, Javier Virto

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

49 Citations (Scopus)

Abstract

We present a new analysis of Bd,s→KK modes within the standard model (SM), relating them in a controlled way through SU(3)-flavor symmetry and QCD-improved factorization. We propose a set of sum rules for Bd,s→K0K̄0 observables. We determine Bs→KK branching ratios and CP asymmetries as functions of Adir(Bd→K0K̄0), pointing out a conflict between BR(Bs→K+K-) in the SM and data. Finally, we predict the amount of U-spin breaking between Bd→π+π- and Bs→K+K-. © 2006 The American Physical Society.

Original language	English
Article number	061801
Journal	Physical Review Letters
Volume	97
DOIs	https://doi.org/10.1103/PhysRevLett.97.061801
Publication status	Published - 17 Aug 2006

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title = "Exploring Bd,s→KK decays through flavor symmetries and QCD factorization",

abstract = "We present a new analysis of Bd,s→KK modes within the standard model (SM), relating them in a controlled way through SU(3)-flavor symmetry and QCD-improved factorization. We propose a set of sum rules for Bd,s→K0{\=K}0 observables. We determine Bs→KK branching ratios and CP asymmetries as functions of Adir(Bd→K0{\=K}0), pointing out a conflict between BR(Bs→K+K-) in the SM and data. Finally, we predict the amount of U-spin breaking between Bd→π+π- and Bs→K+K-. {\textcopyright} 2006 The American Physical Society.",

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AU - Descotes-Genon, Sébastien

AU - Matias, Joaquim

AU - Virto, Javier

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N2 - We present a new analysis of Bd,s→KK modes within the standard model (SM), relating them in a controlled way through SU(3)-flavor symmetry and QCD-improved factorization. We propose a set of sum rules for Bd,s→K0K̄0 observables. We determine Bs→KK branching ratios and CP asymmetries as functions of Adir(Bd→K0K̄0), pointing out a conflict between BR(Bs→K+K-) in the SM and data. Finally, we predict the amount of U-spin breaking between Bd→π+π- and Bs→K+K-. © 2006 The American Physical Society.

AB - We present a new analysis of Bd,s→KK modes within the standard model (SM), relating them in a controlled way through SU(3)-flavor symmetry and QCD-improved factorization. We propose a set of sum rules for Bd,s→K0K̄0 observables. We determine Bs→KK branching ratios and CP asymmetries as functions of Adir(Bd→K0K̄0), pointing out a conflict between BR(Bs→K+K-) in the SM and data. Finally, we predict the amount of U-spin breaking between Bd→π+π- and Bs→K+K-. © 2006 The American Physical Society.

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