QED radiative corrections to the decay pi0 --> e+ e-статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We reconsider QED radiative corrections (RC) to the π0 →e+e− decay width. One kind of RC
investigated earlier has a renormalization group origin and can be associated with the final state interaction of electron and positron. It determines the distribution of lepton pair invariant masses in the whole kinematic region. The other type of RC has a double-logarithmic character and is related to almost on-mass-shell behavior of the lepton form factors. The total effect of RC for π0 →e+e− decay is estimated to be 3.2%, and for η →e+e− decay it is 4.3%.