Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 84: Search for Dark Matter IV

T 84.3: Vortrag

Donnerstag, 3. April 2025, 16:45–17:00, VG 4.102

Investigation of hadronic Backgrounds for Lohengrin — •Laney Klipphahn for the Lohengrin collaboration — Universität Bonn

The search for dark matter has long been of interest to scientists around the world. Previous searches have so far been unsuccessful in finding proposed DM particles. A promising and not well explored family of DM models contains dark matter particles with masses below ≈ 1 GeV connected through a portal interaction to the standard model. The Lohengrin experiment at the ELSA electron accelerator in Bonn is a fixed target experiment designed to probe this mass range by searching for dark photons in a dark bremsstrahlung process in the target.

Lohengrin will probe the dark sector by analyzing events with a significant amount of missing momentum in the final state. Hadronic final states comprise a particularly challenging background to the dark photon search, as single nucleons or mesons can be ejected from the target at high angles, evading the detectors that are placed in forward direction. In this talk I will present the results of a MC driven background estimation for the Lohengrin experiment, and its impact on the design and layout of the detector.

Keywords: Dark Matter; Dark Photon; ELSA Accelerator; Lohengrin; Hadronic Backgrounds