Final state interactions and ε′/ε: a critical look
نویسندگان
چکیده
منابع مشابه
Final State Interactions and ε ′ / ε : A Critical Look
We critically analyze recent attempts to include final state interaction (FSI) effects in the calculation of the CP violating ratio ε/ε. In particular the approach of using the Muskhelishvili-Omnès equation for the decay amplitudes is examined. We find that the values of the dispersive correction factors are very sensitive to initial conditions which are, at present, out of control, and demonst...
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Precise measurements of the mass and width of the W boson are carried out in e + e − collisions at Lep, by kinematic reconstruction of the invariant mass distributions of W + W − → qq ′ ℓν ℓ and W + W − → qq ′ qq ′ candidate events. The most recent combination of such results from Aleph, Delphi, L3 and Opal uses approximately 82% of the final Lep2 integrated luminosity and is preliminary. The m...
متن کاملFinal State Interactions and Ε
I discuss the rôle of strong final state interactions (FSI) in K → 2π decays. In this case strong FSI effects can be resummed [1,2] by solving the Omnès problem for K → 2π amplitudes. Implications for the CP conserving ∆I = 1/2 ratio and the direct CP violation parameter ε ′ /ε are also discussed.
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Strong final state interaction (FSI) effects can play a central role in the Standard Model prediction of weak K → 2π matrix elements. Here, I discuss how FSI's affect the direct CP violation parameter ε ′ /ε by solving the Omnès problem for the necessary K → 2π amplitudes. The main results of this analysis have been reported in a previous paper 1 and are further discussed in Refs. 2,3. The resu...
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A global previous analysis of two-body nonleptonic decays of D mesons has been extended to the decays involving light scalar mesons. The allowance for final state interaction also in nonresonant channels provides a fit of much improved quality and with less symmetry breaking in the axial charges. We give predictions for about 50 decay branching ratios yet to be measured. We also discuss long di...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2000
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(00)00362-2