EF01 studies Higgs properties, including mass, width, and couplings, at proposed future colliders including pp, e+e-, and ep machines. Double Higgs production and subsequent limits on the Higgs self-coupling are included in the EF01 activities, along with the combination of measurements of single and double Higgs production.

• Higgs mass and width
• Higgs decays (includes H to invisible and rare decays)
• Higgs production modes: inclusive and differential measurements (includes ttH)
• HH production (includes resonant production)
• Higgs self-coupling
• Anomalous couplings (including CP violation)
• Inputs to the Global Fit

These topics will benefit from the synergies with other topical groups . All groups commit to working together to ensure the least possible duplication and a full sharing of information. Cross-group topics are:

• Flavor violating Higgs production and decays (EF02 - EW Physics: Higgs Boson as a portal to new physics)
• (SM)EFT analyses of Higgs observables (EF04 - EW Precision Physics and constraining new physics)
• Effect on Higgs couplings to fermions/bosons and on the Higgs width from extending the scalar sector (EF02 - EW Physics: Higgs Boson as a portal to new physics)

Please express your interest in either performing a study or join studies in a particular area, using this simple google form.

Feel free to email us if you want to give a presentation at one of the upcoming meetings.

An updated list of published studies on Higgs boson properties at future colliders can be found here

Wednesdays noon-2PM Eastern Time.

• May 13, 2020, EF01 Kick-off Meeting , **recording**
• May 27, 2020, joint with EF02, **recording**
• June 24, 2020, Differential Higgs measurements, CP violating Higgs Couplings, **recording**
• July 7,8, 2020 EF Preparatory Joint Sessions
• July 20-22, 2020 EF workshop: Open Questions and New Ideas
• Aug. 5, 2020 EF01 meeting, Higgs mass and width, ttHH, H to invisible, **recording**
• Sept. 2, 2020 EF01 meeting, Measuring the electron Yukawa coupling, **recording**
• Sept. 15, 2020 , EF01, EF02 meeting, Discussion of HH Benchmarks, **recording**
• Sept. 24, 2020, Joint with EF04, Discussion of SMEFT fits for Snowmass, **recording**

Thursdays 10 am-noon Eastern Time.

• Oct. 22, 2020, CP properties and HH, *recording**
• Nov. 5, 2020, Higgs invisible and couplings, *recording*
• Nov. 19, 2020 Detector requirements, *recording*
• Dec. 10, 2020 Higgs at Muon collider, *recording*
• Apr. 15, 2021 HH benchamarks
• Aug. 18, 2021 Higgs inverse problem, interference , *recording*
• Sep. 15, 2021 Higgs and light Yukawa, Xcc gamma-gamma collider , *recording*
• Nov. 3 , 2021 Update on LOIs , *recording*
• Jan. 12, 2022 Update on LOIs, *recording*

Letters of Intent submitted to Energy Frontier (as primary frontier) shown in this link. Here is the list of submitted LOIs that include EF as primary or secondary topic. First index before “/” corresponds to the primary frontier used for the submission.