Model-Agnostic Exploration of the Mass Reach of Precision Higgs Boson Coupling Measurements

Abstract

To understand the possibility for precision Higgs boson coupling measurements to access effects of very heavy new particles, I present five scenarios in which significant deviations in Higgs boson couplings are produced by new particles with multi-TeV masses. These scenarios indicate that such precision measurements provide opportunities to reach well beyond the capabilities of direct particle searches at the HL-LHC.

Comments: 21 pages, 6 figures; submitted to the proceedings of the US Community Study on the Future of Particle Physics (Snowmass 2021); v3: references added and minor corrections