1,472 research outputs found
HERA high events as indications of excited leptons with weak isotopic spin 3/2
The H1 and ZEUS anomalous events are interpreted as being due to the
production and the decay of excited leptons , which correspond to spin 1/2
resonances of the first generation lepton doublet () with W triplet.
This assumption is supported by considering of Bethe-Salpeter equation in the
ladder approximation with anomalous triple gauge boson vertex. The solution
with weak isospin is shown to exist for zero mass state, that means
M_EEWEW\lambda \simeq 0.5$. Isotopic relations for
different channels are presented as a tool for checking the interpretation.Comment: 8 pages, latex, no figure
Higher order pair corrections to electron-positron annihilation
Radiative corrections due to pair production in process of electron-positron
annihilation are considered. The main attention is paid to the corrections of
the third order. Simultaneous emission of photons and pairs is taken into
account. The leading log approximation and convolution procedure are used.
Exponentiation is discussed. Theoretical uncertainty in description of higher
order secondary pairs is estimated.Comment: 14 pages, extended version prepared for JHE
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