Unbroken $SU(2)$ at a 100 TeV collider

Abstract

A future 100 TeV pp collider will explore energies much higher than the scale of electroweak (EW) symmetry breaking. In this paper we study some of the phenomenological consequences of this fact, concentrating on enhanced bremsstrahlung of EW gauge bosons. We survey a handful of possible new physics experimental searches one can pursue at a 100 TeV collider using this phenomenon. The most dramatic effect is the non-negligible radiation of EW gauge bosons from neutrinos, making them partly visible objects. The presence of collinear EW radiation allows for the full reconstruction of neutrinos under certain circumstances. We also show that the presence of EW radiation allows one to distinguish the $SU(2)$ quantum numbers of various new physics particles. We consider examples of two completely different new physics paradigms, additional gauge groups and SUSY, where the bremsstrahlung radiation of $W$ and $Z$ from $W^{\prime }$s, $Z^{\prime }$s or stops allows one to determine the couplings and the mixing angles of the new particles (respectively). Finally, we show how the emission of $W$s and $Z$s from high $p_T$ Higgs bosons can be used to test the couplings of new physics to the Higgs boson.

27 pages, 10 figures

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