Speaker
Description
We want to establish the reach to possible deviations of the Higgs couplings from their SM values, to do this we look at processes with longitudinally polarised vector bosons in the final states at high energies.
Especially, our analysis is grounded on the observation that deviations from the Standard Model are characterised by an energy growing behaviour in the amplitudes, so that at higher energies New Physics signatures appear stronger and compete with the loss of statistics. In the context of the High Luminosity LHC we have considered the process pp > LLLL jj, where L is a longitudinally polarised vector boson, to constraint possible deviations of the Higgs self interaction.
From the same perspective, we have also studied the process e+e- > LL at CLIC, where along with higher CM-energy values also beam polarisation is used to better constraint New Physics effects in the Higgs coupling.
