PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Dark Matter
New approach to DM searches with mono-photon signature
K. Mekala*, J. Kalinowski, W. Kotlarski, A.F. Zarnecki and K. Zembaczynski
Full text: pdf
Pre-published on: November 21, 2022
Published on: June 15, 2023
High energy $e^+e^-$ colliders offer unique possibility for the most general dark matter (DM) search based on the mono-photon signature. Analysis of the energy spectrum and angular distributions of
photons from the initial state radiation can be used to search for hard processes with invisible final
state production. Most studies in the past focused on scenarios assuming heavy mediator exchange.
We notice, however, that scenarios with light mediator exchange are still not excluded by existing
experimental data, if the mediator coupling to Standard Model (SM) particles is very small. We
proposed a novel approach, where the experimental sensitivity to light mediator production is
defined in terms of both the mediator mass and mediator width. This approach is more model
independent than the approach assuming given mediator coupling values to SM and DM particles.
Presented in this contribution are results on the expected sensitivity of the International Linear
Collider (ILC) and Compact Linear Collider (CLIC) experiments to dark matter production. The
use of beam polarisation can largly improve the sensitivity to DM production scenarios and reduce
the impact of systematic uncertainties. Precision of mediator mass, width and coupling structure
determination, in case of the signal observation, is also derived.
DOI: https://doi.org/10.22323/1.414.0294
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