IIHE invited seminar: The global electroweak fit: status and prospects
by
DrMax Baak(CERN)
→
Europe/Brussels
Universe
Universe
Description
For a long time, global fits of the electroweak sector of the
Standard Model (SM) have been used to exploit measurements of
electroweak precision observables at lepton colliders (LEP, SLC),
together with measurements at hadron colliders (Tevatron, LHC), and
accurate theoretical predictions at multi-loop level, to constrain
the free parameters of the SM, like the Higgs and top masses.
Today, all fundamental SM parameters, including information on the
Higgs couplings, are experimentally determined and the global fits
are used as powerful tools to assess the validity of the theory and
to constrain scenarios for new physics. Future measurements at the
Large Hadron Collider (LHC) and the International Linear Collider (ILC)
promise to improve the experimental precision of key observables used
in the fit.
After an update of the current electroweak fit results based on latest 2-loop
calculations we present the prospects for the LHC and ILC. We perform a
detailed analysis of the impact of present and future sources of systematic
uncertainties on the fit predictions. By using LHC measurements of the signal
strength of Higgs production and decay channels we examine the present and future
impact of electroweak precision observables on a model with modified
couplings of the Higgs boson to fermions and bosons.
