Probing Higgs boson interactions at future colliders

Higgs boson is the only particle in the Standard Model (SM) yet to be discovered. The Large Hadron Collider (LHC) is expected to be capable of searching the SM Higgs boson over most of the allowed range of its mass. Once the Higgs boson is detected at the LHC, it will be necessary to measure its properties at the International e+ e- Linear Collider (ILC) to establish it as the SM one. In this context we examine, in a model independent way, the sensitivity of an e+ e- Linear Collider operating at a 
center-of-mass energy 500 GeV to probe the ZZH and WWH interactions with/without the use of polarized initial beams and/or of the information on final state fermion polarization. We also analyze the dependence of these sensitivities on beam energy. We conclude that running the collider at lower energies (say at 500 GeV), but with linearly polarized beams is more beneficial to study these interactions. We found further that the use of transverse beam polarization can play a crucial role to probe ALL the different parts of the anomalous ZZH couplings independently.