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EW physics at very high energies: A multi-TeV muon collider as a case study

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If you have a question about this talk, please contact Nico Gubernari .

The Standard Model electroweak (EW) sector exhibits some novel features at very high energies. At energies much larger than the EW scale, the EW gauge symmetry is essentially restored and the massless splitting phenomena dominate the EW physics. We discuss the emergence of additional ``ultra-collinear’’ splitting phenomena and the naive violation of the Goldstone-boson Equivalence Theorem. Because the SU(2) quantum numbers are explicit and observable in common physical processes, subtitles of the Bloch-Nordsieck theorem violation are discussed. The vector-boson fusion processes take over as the leading contributions at high energies, and the EW parton distribution functions are formulated. We implement the EW showering and illustrate its importance by calculating a number of physical processes at high energies within and beyond the SM. Finally, we take a multi-TeV muon collider as a case study for precision Higgs physics and for discovery at the new energy frontier.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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