20-25 October 2019
PSI
Europe/Zurich timezone

NA64 - Search for dark matter at CERN SPS

22 Oct 2019, 17:04
1m
WHGA/001 - Auditorium (PSI)

WHGA/001 - Auditorium

PSI

Speaker

Emilio Depero (ETH)

Description

NA64 is a fixed target experiment at the CERN SPS aiming at a sensitive search for hidden sectors. In this talk, we will present our latest results on the search for a new sub-GeV vector gauge boson (A′) mediated dark matter (χ) production. The A′, called dark photon, could be generated in the reaction e−Z→e−ZA′ of 100 GeV electrons dumped against an active target which is followed by the prompt invisible decay A′→χχ. The experimental signature of this process would be a clean event with an isolated electron and large missing energy in the detector. This allows us to set new limits on the γ−A′ mixing strength and constrain the new parameter space for the most interesting light dark matter models. Results on the search for the visible A' -> e+e− decays, as well as X→ e+e− decay of a new 17 MeV X boson, which could explain a recently observed anomaly in the 8Be transitions will be also discussed.

Primary authors

Emilio Depero (ETH) Paolo Crivelli (Institute for Particle Physics, ETH Zurich) Dr Laura Molina Bueno (ETH) collaborations NA64 (CERN)

Presentation Materials