Long-distance final-state interactions andJ/ψdecay
نویسندگان
چکیده
منابع مشابه
Long-distance final-state interactions and J/ψ decay
To understand the short versus long-distance final-state interactions, we have performed a detailed amplitude analysis for the two-body decay J/ψ → 10. The current data favor a large relative phase nearly 90 between the three-gluon and the one-photon decay amplitudes. The source of the phase is apparently the long-distance final-state interaction. Nothing anomalous is found in the magnitudes of...
متن کاملFinal State Interactions
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.
متن کاملFinal State Interactions in Kaon Decays
We quantify the important effect of strong final state interactions in the weak K → 2π amplitudes, using the measured π-π phase shifts with J = 0 and I = 0, 2. The main results of this analysis, with their implications for ε/ε and the ∆I = 1/2 rule, have been already presented in a previous paper [1]. Here we provide a detailed formal derivation of those results and further discuss the Standard...
متن کاملFinal State Interactions in Kaon Decays Revisited
We examine effects of final state interactions (FSI) in kaon decays using a new scheme without the Omnés function, and show that while ∆I = 1/2 rule is impossible to be explained in terms of FSI alone, ′/ ∼ 16.5 × 10−4 is obtained through FSI, if the calculation is concerned only with the CP-violating parts. The ππ contribution to the mL −mS mass difference is shown to be about 14%, if the size...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.57.5717