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Updated: Aug 8, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Probing MeV dark matter at low-energy e+e- colliders
Natalia Borodatchenkova1, Debajyoti Choudhury, Manuel Drees
1Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn, Germany.
Abstract:
It has been suggested that the pair annihilation of dark matter particles chi 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 M(U) below a few hundred MeV. We point out that over most of the allowed parameter space, the process e+e--->U(gamma), followed by the decay of U into either an e+e- pair or an invisible (nu(-)nu or chi(-)chi) 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 Phi factory DAPhiNE.
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