3rd ECFA workshop on e+e- Higgs/EW/Top Factories, Paris, 9-11 Oct. 24

Prospects for New Discoveries Through Precision Measurements at e+e- Colliders

10 Oct 2024, 11:40

20m

Amphi Pasquier

ORAL WG1-GLOB - Physics Potential: Global interpretations Parallel - WG1-GLOB

Speaker

Dr Pier Paolo Giardino (University "Autonoma" of Madrid)

Description

We systematically study potential effects of BSM physics in the $e^{+}{e}^{-}\to ZH$ 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 electro-weak coupling. We consider both polarized and unpolarized electron and positron beams and present results for $\sqrt{s}=240$, $365$ and $500$ GeV and emphasize observables where the NLO predictions differ significantly from the leading order (LO) results. At NLO, a sensitivity arises to operators that do not contribute at tree level, such as the Higgs trilinear coupling , CP violating operators, dimension-6 operators involving the top quark or anomalous Higgs-Z boson couplings, among many others. We compare the prospects of future $e^{+}{e}^{-}$ colliders to explore these new physics effects with measurements from the LHC, electron EDMs (for CP violating operators), and Z pole measurements.

Presentation materials

Talk.pdf