A global view on the Higgs self-coupling at lepton colliders
(2018) Journal of High Energy Physics — Vol. 02, n° 2, p. 178 (2018)
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- Authors
Di Vita, Stefano 
- 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.
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Citations
Di Vita, S., Durieux, G., Grojean, C., Gu, J., Liu, Z., Panico, G., Riembau, M., & Vantalon, T. (2018). A global view on the Higgs self-coupling at lepton colliders. Journal of High Energy Physics, 02(2), 178. https://doi.org/10.1007/JHEP02(2018)178 (Original work published 2018)