On 19/12/21 2:53 AM, Phillip Helbig (undress to reply) wrote:
...
No dark matter has been detected.

[apart from its gravitational influence]

... Experiments for direct detection or
production in colliders have turned up nothing. Possibly
self-annihilation is seen in gamma rays at the centre of the Milky Way,
but this is far from clear. There is still a window for WIMPs as dark
matter, probably very low mass (de Broglie wavelengths measured in
kiloparsecs) or high mass (TeV). Joe also thinks, though, that
primordial black holes might be the best bet.

As a theoretical physicist, I actually hope that primordial black holes
do exist, but do not give the answer! (To the missing dark matter I
mean, the universe and the rest put aside for a moment..) Because the
standard model of particle physics would be much more convincing if the
axion were found to exist. Any axion discussions on the symposium?
https://www.quantamagazine.org/why-dark-matter-might-be-axions-20191127/

--
Jos