Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 72: Experimental techniques in astroparticle physics III

T 72.10: Talk

Wednesday, March 17, 2021, 18:15–18:30, Tv

KWISP - Latest results on the chameleon hunt at the CAST experiment at CERN — •Justin Baier — Uni Freiburg

The KWISP (Kinetic Weakly Interacting Slim Particle) detector is part of the CAST experiment at CERN exploring the dark sector. It utilizes an ultra-sensitive opto-mechanical force sensor for the search for solar chameleons. Chameleons are hypothetical scalar particles postulated as dark energy candidates, which have a direct coupling to matter depending on the local density. Considering these characteristics a flux of solar chameleons hitting a solid surface at grazing incidence will, under certain conditions, reflect and exert the equivalent of a radiation pressure. To exploit this trait the KWISP sensor consists of a thin and rigid dielectric membrane placed inside a resonant optical cavity. The latest results will be presented in this talk.