Abstract
High-precision experimental measurements of the properties of the Higgs boson at sim 125 GeV as well as electroweak precision observables such as the W-boson mass or the effective weak leptonic mixing angle are expected at future e^+e^- colliders such as the FCC-ee. This high anticipated precision has to be matched with theory predictions for the measured quantities at the same level of accuracy. We briefly summarize the status of these predictions within the standard model and of the tools that are used for their determination. We outline how the theory predictions will have to be improved in order to reach the required accuracy, and also comment on the simulation frameworks for the Higgs and EW precision program.
Highlights
With the discovery of the Higgs boson, all possible elements of the standard model (SM) have been experimentally confirmed and tested in great depth
One promising way to probe such new physics is through precision measurements of the properties of the Higgs boson
While we focus on the FCC-ee, they are valid for all future high precision e+e− colliders running above the H Z threshold
Summary
With the discovery of the Higgs boson, all possible elements of the standard model (SM) have been experimentally confirmed and tested in great depth. One promising way to probe such new physics is through precision measurements of the properties of the Higgs boson. A complementary way is to measure electroweak precision (pseudo-)observables (EWPO) with higher precision These are the avenues pursued by severa√l proposals for a future e+e− collider. In pa√rticular, the FCC-ee concept is designed to run at s = 250 GeV as a Higgs factory, and at s ∼ MZ , 2MW for high-precision EWPO measurements. In this way, it can improve (indirect) probes for new physics by several orders of magnitude compared to existing bounds [1,2,3].
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