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T: Fachverband Teilchenphysik

T 84: Search for Dark Matter IV

T 84.1: Vortrag

Donnerstag, 3. April 2025, 16:15–16:30, VG 4.102

Status of the DarkMESA Experiment — •Mirco Christmann for the MAGIX collaboration — Institute for Nuclear Physics, JGU Mainz, Germany

At the Institute for Nuclear Physics in Mainz the new electron accelerator MESA will be operational shortly. The high-power beam dump of the P2 experiment (150 MeV, 150 µA) is ideally suited for a parasitic dark sector experiment – DarkMESA.

The experiment is designed for the detection of Light Dark Matter (LDM) which in the simplest model couples to a massive vector particle, the dark photon γ. It can potentially be produced in the beam dump by a process analogous to photon Bremsstrahlung and may then decay into Dark Matter (DM) particle pairs χχ. A fraction of them scatter off electrons or nuclei in the DarkMESA detectors.

This contribution discusses the extension of the simulation framework through the integration of additional models and the current status of the Phase A setup. Beyond the use of a traditional calorimeter, the possibility of utilizing a liquid scintillator for Phase B is under investigation. Initial results obtained in co-operation with the NuDoubt⁺⁺ collaboration are presented.

Keywords: Light Dark Matter; Dark Photon; Electron Accelerator; Calorimeter; Liquid Scintillator