Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 75: Higgs Physics VII
T 75.8: Talk
Thursday, March 19, 2026, 18:00–18:15, KH 01.019
Probing the Higgs potential via Higgs pair production at photon-photon colliders — •Gudrid Moortgat-Pick1,2, Marten Berger1, Georg Weiglein2, and Johannes Braathen2 — 1University of Hamburg — 2Deutsches Elektronen Synchrotron
A γγ collider, either in conjunction with an e+e− linear collider or as a stand-alone facility, offers a very attractive Higgs physics programme at relatively low centre-of-mass (c.m.) energies. A c.m. energy as low as 280 GeV can probe the Higgs potential via the Higgs pair production process providing access to the trilinear Higgs-boson self-coupling. High polarisation of the photon beams (produced via Compton back-scattering) can be achieved and adjusted by flipping the polarisation of the incident laser. The prospects for exploring the Higgs pair production process at a γγ collider are assessed by comparing different running scenarios utilising different types of the incident laser. The possibility to use photon polarisation has been exploited as well.
Keywords: Photon-photon collisions; Higgs potential; Di-Higg production; Trilinear Higgs couplings; Compton backscattering