18–23 Aug 2025
University of California at Santa Cruz
US/Pacific timezone

BSM Higgs physics at the Photon collider

Not scheduled
20m
University of California at Santa Cruz

University of California at Santa Cruz

Higgs theory and experiment Higgs theory and experiment

Speaker

Marten Berger (University Hamburg)

Description

High-energy $\gamma\gamma$- and $e\gamma$-collisions offer a rich phenomenological programme, complementary to $e^+e^-$ collisions at a linear collider both in kinematic as well as physics reaches. In particular, $\gamma\gamma$ collisions offer a unique setting to investigate properties of the Higgs boson(s). High polarisation of the photon beams (produced via Compton back-scattering) can be achieved and adjusted by flipping the polarisation of the incident laser. Furthermore, prospects for di-Higgs production at a $\gamma\gamma$ collider are particularly promising, and could open the way to a direct measurement of the trilinear Higgs self-coupling, at lower centre-of-mass energies than at an $e^+e^-$ collider.
In this talk we will present new results about the di-Higgs production process at the $\gamma\gamma$ collider, comparing different running tups. We will discuss the possibility of measuring the trilinear Higgs coupling, also making use of photon polarisations to disentangle different contributions to di-Higgs production.

Author

Marten Berger (University Hamburg)

Co-authors

Georg Ralf Weiglein (Deutsches Elektronen-Synchrotron (DE)) Gudrid Moortgat-Pick Johannes Alf Braathen (DESY)

Presentation materials

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