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SUMMARY:An effective field theory approach to the electroweak corrections 
 at LEP energies
DTSTART;VALUE=DATE-TIME:19990617T100000Z
DTEND;VALUE=DATE-TIME:19990617T110000Z
DTSTAMP;VALUE=DATE-TIME:20260704T174513Z
UID:indico-event-1127@indico.ific.uv.es
DESCRIPTION:In the framework of the effective field theory (EFT) we discus
 s the electroweak (EW) corrections at LEP energies. We obtain the effectiv
 e Lagrangian in the large m_t limit\, and reproduce analytically the domin
 ant EW corrections to the LEP2 processes e+e- --> gamma Z and e+e- --> ZZ.
  To include effects of finite top-quark and Higgs masses\, we use the effe
 ctive Lagrangian at tree level and fit LEP1/SLD observables with four arbi
 trary parameters\, plus alpha_s(m_Z). The EFT approach works remarkably we
 ll. Using the effective couplings determined from the fit\, and tree-level
  EFT formulae\, we predict the cross sections for e+e- -->Z Z\, gamma Z at
  a level better than 1%.\n\nhttps://indico.ific.uv.es/event/1127/
LOCATION:Dpto. de Fisica Teorica (UVEG) Sala Seminarios
URL:https://indico.ific.uv.es/event/1127/
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