CT2: Rare decays of B mesons
Processes of flavour physics play an essential role for the identification of the correct new physics model at the TeV energy scale. A prerequisite in the quark sector is a sufficient precise control of effects due to strong interaction. Particularly useful and plentyful information can be obtained from the numerous rare decay modes of B mesons. Besides the application of the approximative flavour symmetry of QCD (isospin, SU(3)) and of experimental data, the factorization theorems in the limit of heavy b quark mass, mb>>ΛQCD, provide additional handles to extend the number of theoretical controlable observables. This is valid for both semileptonic and radiative B→ργ, Bs→φγ, B→K(*)l+l-, B→K(*)ν νbar as well as rare hadronic two body decays like B→ππ, B→ρρ, Bs→φφ. New applications of factorization theorems in particular in combination with other methods can improve the sensitivity to signals of new physics and will lead to a more realistic assessment of hadronic uncertainties. The improvements of the theory of hadronic matrix elements in exclusive B decays allow to extend systematic analyses of rare and hadronic decays to scenarios of new physics.
Processes of flavour physics play an essential role for the identification of the correct new physics model at the TeV energy scale. A prerequisite in the quark sector is a sufficient precise control of effects due to strong interaction. Particularly useful and plentyful information can be obtained from the numerous rare decay modes of B mesons. Besides the application of the approximative flavour symmetry of QCD (isospin, SU(3)) and of experimental data, the factorization theorems in the limit of heavy b quark mass, mb>>ΛQCD, provide additional handles to extend the number of theoretical controlable observables. This is valid for both semileptonic and radiative B→ργ, Bs→φγ, B→K(*)l+l-, B→K(*)ν νbar as well as rare hadronic two body decays like B→ππ, B→ρρ, Bs→φφ. New applications of factorization theorems in particular in combination with other methods can improve the sensitivity to signals of new physics and will lead to a more realistic assessment of hadronic uncertainties. The improvements of the theory of hadronic matrix elements in exclusive B decays allow to extend systematic analyses of rare and hadronic decays to scenarios of new physics.
