Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 2, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP02(2018)178
Keywords
Higgs Physics; Effective Field Theories; Beyond Standard Model
Categories
Funding
- Office of the National Administrative Committee of Postdoctoral Researchers of China (ONACPR)
- DESY
- Helmholtz Association
- la Caixa, Severo Ochoa grant program
- Spanish Ministry MEC [FPA2015-64041-C2-1-P, FPA2014-55613-P, FPA2011-25948]
- Generalitat de Catalunya grant [2014-SGR-1450]
- Severo Ochoa excellence program of MINECO [SO-2012-0234]
- European Commission [631962]
- Collaborative Research Center of the Deutsche Forschungsgemeinschaft (DFG), Particles, Strings and the Early Universe [SFB676]
- CERN Theory division
- U.S. Department of Energy, Office of Science, Office of High Energy Physics [DE-AC02-07CH11359]
- United States Government
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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 similar to 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 similar to 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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