Probing MeV Dark Matter at low-energy colliders e<sup>+</sup>e<sup>-</sup>
by
Prof.Manuel Drees(Bonn University)
→
Pacific/Honolulu
WAT 417 (University of Hawai'i, Manoa)
WAT 417
University of Hawai'i, Manoa
2505 Correa Road
Description
It has been suggested that the pair annihilation of Dark Matter particles
χ with mass between 0.5 and 20 MeV into e+e- pairs
could be responsible for the excess flux (detected by the INTEGRAL satellite)
of 511 keV photons coming from the central region of our galaxy. The simplest
way to achieve the required cross section while respecting existing
constraints is to introduce a new vector boson U with mass MU below a few hundred
MeV. We point out that over most of the allowed parameter space, the process
e+e- → U γ, followed by the decay of U into either an
e+e- pair or an invisible (ν ν or χ
χ) channel,
should lead to signals detectable by current B- factory experiments. A
smaller, but still substantial, region of parameter space can also be probed
at the Φ factory DA Φ NE.