25–29 Aug 2025
Monona Terrace
US/Central timezone

Absolute Higgs boson cross section, mass, and width at FCC-ee

28 Aug 2025, 14:20
20m
Lecture Hall

Lecture Hall

Future Colliders Parallel

Speaker

Ang Li (Brookhaven National Laboratory (US))

Description

The FCC-ee programme is uniquely positioned to provide unprecedented precision on the fundamental properties of the Higgs boson. At the center-of-mass energies 240 and 365 GeV, the FCC-ee will produce millions of Higgs bosons via Higgs-strahlung and vector boson fusion. The clean experimental environment allows a model-independent measurement of the absolute ZH cross-section to better than per-mil accuracy, directly determining the Higgs coupling to Z bosons. Utilizing the recoil-mass technique in leptonic and hadronic Z decays, the Higgs boson mass will be measured with a precision of a few MeV. Combining these measurements with precise determinations of exclusive branching ratios will yield the total Higgs width at percent-level precision. These measurements will significantly advance our understanding of the Standard Model and guide the search for new physics.

Author

Ang Li (Brookhaven National Laboratory (US))

Co-author

Markus Klute (Karlsruhe Inst. of Technology (GER))

Presentation materials