Speaker
Mr
Emilio Depero
(ETH Zurich)
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 author
Mr
Emilio Depero
(ETH Zurich)
