Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 6: Suche nach dunkler Materie I

T 6.7: Vortrag

Montag, 19. März 2018, 17:35–17:50, Philo-HS6

Mitigating detector effects in Dark Matter searches with the ATLAS Experiment — •Thomas Spieker — Kirchhoff Institut für Physik Heidelberg

The particle nature of Dark Matter (DM) is one of the main open questions in particle physics. So far, none of its detection attempts were successful. Testing and constraining the many models and theories predicting DM is a challenge as only few of them can be considered in an analysis. The search results are usually presented at detector level, which makes reinterpretation in terms of additional models difficult.

A Dark Matter search in final states with missing transverse momentum and jets was performed with the ATLAS Experiment using a novel approach. The results were unfolded to particle level using bin-to-bin unfolding. This simplifies the comparison of new theories with the presented results, as any detector effects are fully corrected for and can be compared at particle level. In a new, more refined iteration of the analysis the unfolding procedure will be performed using an iterative, dynamically stabilized Bayesian method. This approach depends less on the Monte Carlo modeling of the relevant processes and therefore yields a more reliable result at particle level. By using unfolding techniques in searches a much wider range of theories can be probed, just as changes in existing models can be compared more easily.