Narrow Results

We discuss the physics opportunities and challenges presented by high energy lepton colliders in the range of center-of-mass energy between few and several tens of TeV. The focus is on the progress attainable on the study of weak and Higgs interactions in connection with new physics scenarios motivated by the shortcomings of the Standard Model.

In this talk I give a snapshot of the ongoing discussion on new physics searches at future colliders. I discuss the unique opportunities of a high energy lepton collider operating at multi-TeV center-of-mass energy and in particular its peculiar capability to carry out at the same time "intensity'' searches with the copious production of Standard Model states as well as directly producing heavy new physics states or probing still heavier new physics via indirect effects.