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WIMPy baryogenesis by Nicolas Bernal (Bonn U.)
Wednesday 12 December 2012, 10:45 - 11:45


Titulo: Phenomenology of WIMPy baryogenesis models
Nicolas Bernal (Bonn University)

A possible connection between the abundances of baryonic and dark
matter (DM) has been explored so far mostly in the context of the
so-called asymmetric DM. Recently, a very different mechanism, dubbed
"WIMPy baryogenesis", has been proposed to relate the baryon asymmetry
to DM annihilation. The DM candidate is a weakly interacting massive
particle (WIMP), and the usual WIMP scenario is slightly extended to
accommodate baryogenesis, which is accomplished around the time of DM
freeze-out. We construct an effective field theory that encompasses a
quite general class of models which implement the WIMPy baryogenesis.
Under some reasonable, simplifying assumptions, we show that a good
portion of the parameter space is allowed for these models, after
experimental constraints are taken into account. Bounds from the LHC
require that the WIMP be heavier than 400 GeV.



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