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

Stefano Di Vita, Gauthier Durieux, Christophe Grojean, Jiayin Gu, Zhen Liu, Giuliano Panico, Marc Riembau, Thibaud Vantalon

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Article number178
JournalJournal of High Energy Physics
Volume2018
Issue number2
DOIs
StatePublished - Feb 1 2018
Externally publishedYes

Bibliographical note

Funding Information:
JG is supported by an International Postdoctoral Exchange Fellowship Program between the Office of the National Administrative Committee of Postdoctoral Researchers of China (ONACPR) and DESY. C.G. is supported by the Helmholtz Association. M.R. is supported by la Caixa, Severo Ochoa grant program. G.P., M.R. and T.V. are supported

Funding Information:
Article funded by SCOAP3.

Publisher Copyright:
© 2018, The Author(s).

Keywords

  • Beyond Standard Model
  • Effective Field Theories
  • Higgs Physics

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