Preprint

PUBDB-2026-00228

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Probing the Higgs potential at a Photon Collider

Berger, M.Extern* ; Braathen, J.DESY* ; Moortgat-Pick, G. (Corresponding author)DESY* ; Weiglein, G.DESY*

2025

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Please use a persistent id in citations: doi:10.3204/PUBDB-2026-00228

Report No.: DESY-25-133; arXiv:2510.05012

Abstract: 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. While the Higgs boson that has been discovered at the LHC can be studied in detail in resonant production at 125~GeV, 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 polarisations for disentangling different kinds of contributions to the Higgs pair production process is emphasised.

Note: 9 pages, 8 figures, Proceedings of the European Physical Society Conference on High Energy Physics (EPS-HEP2025), Marseille, France

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe (390833306) (390833306)
3. DFG project G:(GEPRIS)491245950 - Open-Access-Publikationskosten / 2025-2027 / DESY Hamburg (491245950) (491245950)
4. DFG project G:(GEPRIS)520070247 - Untersuchungen von Neue Physik mit generischen Präzisionsberechnungen (520070247) (520070247)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:

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