Special seminar talk - Giovanni Pelliccioli: Accessing weak-boson polarizations: theory modelling and LHC phenomenology

Abstract:

Isolating polarization modes of electroweak bosons provides an important probe for the Standard Model (SM). Furthermore, it represents a source of discriminating power between the SM and new-physics models. The Run 2 data-set and the foreseen luminosity of the next LHC runs will enable polarization measurements in multi-boson processes. Therefore a more complete theoretical understanding of the polarization structure is needed for such processes. After recalling the main issues that arise when separating polarizations at the amplitude level, I will present some recent developments in the Monte Carlo description of polarized bosons, and a number of phenomenological results relevant for LHC searches.