The effective W approximation for WW scattering and new physics

Who: Roberto Franceschini (EPFL Lausanne)
When: Friday, August 12, 2011 at 14:15
Where: The CP³ meeting room

In this talk I review the motivations and the prospects of the study of the scattering of  W boson.  The details  of the mechanism of electroweak symmetry breaking (EWSB) that can be unveiled studying WW scattering will be presented. The issue of the extraction of  on-shell WW -> WW scattering amplitudes from the study of physical processes initiated by fermions, i.e. qq -> qqWW, will be addresses using the effective W approximation (EWA). A discussion of the regimes of validity and of the expected corrections to the EWA will be presented together with a detailed comparison of the EWA to existing MC and analytical computations.