skip to main content


Title: A global view on the Higgs self-coupling at lepton colliders

We perform a global effective-field-theory analysis to assess the precision on the determination of the Higgs trilinear self-coupling at future lepton colliders. Two main scenarios are considered, depending on whether the center-of-mass energy of the colliders is sufficient or not to access Higgs pair production processes. Low-energy machines allow for ~40% precision on the extraction of the Higgs trilinear coupling through the exploitation of next-to-leading-order effects in single Higgs measurements, provided that runs at both 240/250 GeV and 350 GeV are available with luminosities in the few attobarns range. A global fit, including possible deviations in other SM couplings, is essential in this case to obtain a robust determination of the Higgs self-coupling. High-energy machines can easily achieve a ~20% precision through Higgs pair production processes. In this case, the impact of additional coupling modifications is milder, although not completely negligible.
ORCiD logo [1] ;  [2] ;  [3] ;  [4] ; ORCiD logo [5] ;  [6] ;  [7] ;  [7]
  1. INFN, Sezione di Milano (Italy); DESY, Hamburg (Germany)
  2. DESY, Hamburg (Germany)
  3. DESY, Hamburg (Germany); Humboldt-Universität zu Berlin (Germany). Institut für Physik
  4. DESY, Hamburg (Germany) ; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing (China)
  5. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Theoretical Physics Department
  6. Universitat Autònoma de Barcelona (Spain). IFAE and BIST
  7. DESY, Hamburg (Germany); Universitat Autònoma de Barcelona (Spain). IFAE and BIST
Publication Date:
Report Number(s):
DESY-17-131; FERMILAB-PUB-17-462-T; arXiv:1711.03978
Journal ID: ISSN 1029-8479; 1635886; TRN: US1801725
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 2; Journal ID: ISSN 1029-8479
Springer Berlin
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Higgs Physics; Effective Field Theories; Beyond Standard Model
OSTI Identifier: