Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 9: Higgs: Erweiterte Modelle

T 9.5: Vortrag

Montag, 25. März 2019, 17:00–17:15, S07

Double Higgs boson production and Higgs self-coupling at CLIC — Philipp Roloff¹, •Ulrike Schnoor¹, Rosa Simoniello^1,2, and Boruo Xu³ — ¹CERN, Geneva, Switzerland — ²Johannes-Gutenberg-Universität Mainz, Germany — ³University of Cambridge, UK

The trilinear Higgs self-coupling has a central role in the understanding of electroweak symmetry breaking as it determines the shape of the Higgs potential. Its investigation is a crucial component of physics at future colliders. CLIC, the Compact Linear Collider, is a high-energy electron-positron accelerator being studied as an option for the post-LHC era. Its high-energy stages at √s=1.5 and 3 TeV give direct access to Higgs boson pair production, from which the Higgs self-coupling can be extracted. This talk covers the full-simulation analysis of the expected sensitivity of the high-energy stages of CLIC to double Higgs production. The cross-section measurement of double Higgsstrahlung and differential observables in W-fusion Higgs-pair production are combined to give the expected sensitivity of CLIC to the trilinear Higgs self-coupling.