2024/09/17 by Konstantin Asteriadis, Asteriadis, Konstantin, S. Dawson +6
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Advanced Data Storage Technologies
paper · pdf · doi:10.48550/arxiv.2409.11466
We systematically study potential effects of Beyond the Standard Model physics in the e+ e- → Z H process. To this end, we include all relevant dimension-6 Standard Model Effective Field Theory operators and work to next-to-leading order (NLO) accuracy in the electroweak coupling. We consider both polarized and unpolarized electron and positron beams and present results for √(s)=240, ~365 and 500~\rm GeV, emphasizing contributions where the NLO predictions differ significantly from the leading order results. At NLO, a sensitivity arises to operators that do not contribute at tree level, such as the Higgs tri-linear coupling, CP-violating operators, and dimension-6 operators involving the top quark, among many others. We compare the prospects of future e+e- colliders to explore these new physics effects with existing measurements from the LHC, electron EDMs (for CP violating operators), and Z pole measurements.