Top-Quarks at 100 TeV
Susanne Westhoff (University of Pittsburgh)

The international effort to build a proton-proton collider at very high energies is driven by two perspectives. We seek to search energy scales beyond the LHC reach for new physics; and we want to explore the electroweak standard model in its unbroken phase. In particular, the heaviest particle of the standard model, the top-quark, appears ultimately massless in processes at very high energies. Focusing on the novel class of top-quark initiated processes at a 100-TeV collider, I will discuss whether the top-quark can be treated as a parton inside the proton. Accordingly, I will propose ways to treat the collinear enhancement from top-quarks emitted along the beam line.