منابع مشابه
Towards a Model Independent Analysis of Rare B Decays
We propose to undertake a model-independent analysis of the inclusive decay rates and distributions in the processes B → Xsγ and B → Xs ll (B = B or B d). We show how measurements of the decay rates and distributions in these processes would allow us to extract the magnitude and sign of the dominant Wilson coefficients of the magnetic moment operator mbs̄LσμνbRF μν and the four-fermion operators...
متن کاملImproved Model-Independent Analysis of Semileptonic and Radiative Rare B Decays
We update the branching ratios for the inclusive decays B → Xsll and the exclusive decays B → (K,K∗)l+l−, with l = e, μ, in the standard model by including the explicit O(αs) and ΛQCD/mb corrections. This framework is used in conjunction with the current measurements of the branching ratios for B → Xsγ and B → Kl+l− decays and upper limits on the branching ratios for the decays B → (K,Xs)ll to ...
متن کاملModel-independent analysis of B-B-bar mixing and CP violation in B decays.
We present a framework to analyze effects of new physics beyond the standard model on B-B̄ mixing and CP violation in B decays in a model-independent manner. Assuming that tree level decay amplitudes are dominated by the standard model ones, new physics contribution to the B-B̄ mixing can be extracted from several measurements at B factories. Using this framework, we show the present constraint o...
متن کاملModel - Independent Analysis of B → πK Decays and Bounds on the Weak Phase γ
A general parametrization of the amplitudes for the rare two-body decays B → πK is introduced, which makes maximal use of theoretical constraints arising from flavour symmetries of the strong interactions and the structure of the low-energy effective weak Hamiltonian. With the help of this parametrization, a model-independent analysis of the branching ratios and direct CP asymmetries in the var...
متن کاملModel - Independent Approaches to QCD and B Decays
We investigate theoretical expectations for B-meson decay rates in the Standard Model. Strong-interaction effects described by quantum chromodynamics (QCD) make this a challenging endeavor. Exact solutions to QCD are not known, but an arsenal of approximation techniques have been developed. We apply effective field theory methods, in particular the sophisticated machinery of the soft-collinear ...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2009
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2009.03.025