Electroweak Penguins, Final State Interaction Phases, andCPViolation inB→KπDecays
نویسندگان
چکیده
منابع مشابه
Electroweak Penguins , Final State Interaction Phases and CP Violation in B →
The recently observed B − → K − π 0 , ¯ K 0 π − and ¯ B 0 → K − π + decay modes appear to have nearly equal branching ratios. This suggests that tree and electroweak penguins play an important role, and inclusion of the latter improves agreement between factorization calculation and experimental data.
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Electroweak penguin (EWP) amplitudes are studied model-independently in B meson decays to charmless final states consisting of a vector meson (V ) and a pseudoscalar meson (P ). A set of SU(3) relations is derived between EWP contributions and tree amplitudes, in the approximation of retaining only the dominant EWP operators Q9 and Q10. Two applications are described for constraining the weak p...
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I review the progress made in the calculation of the electroweak penguins Q7,8 in the framework of the Hadronic Approximation to large-Nc QCD, and give an update of results. A nonzero value of ǫ ′ /ǫ signals the existence of direct CP violation in the decay K → ππ and is a measure of the amount of CP violation in the Standard Model. At present the world average is given by 1 ǫ ′ ǫ = (16.6 ± 1.6...
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We discuss the role of electroweak penguins in B decays to two light pseudoscalar mesons. We confirm that the extraction of the weak phase α through the isospin analysis involving B → ππ decays is largely unaffected by such operators. However, the methods proposed to obtain weak and strong phases by relating B → ππ, B → πK and B → KK decays through flavor SU(3) will be invalidated if electrowea...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1999
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.82.2240