A Simple Testable Model of Baryon Number Violation: Baryogenesis, Dark
  Matter, Neutron-Antineutron Oscillation and Collider Signals
  We study a simple TeV-scale model of baryon number violation which explains
the observed proximity of the dark matter and baryon abundances. The model has
constraints arising from both low and high-energy processes, and in particular,
predicts a sizable rate for the neutron-antineutron ($n-\bar{n}$) oscillation
at low energy and the monojet signal at the LHC. We find an interesting
complementarity among the constraints arising from the observed baryon
asymmetry, ratio of dark matter and baryon abundances, $n-\bar{n}$ oscillation
lifetime and the LHC monojet signal. There are regions in the parameter space
where the $n-\bar{n}$ oscillation lifetime is found to be more constraining
than the LHC constraints, which illustrates the importance of the
next-generation $n-\bar{n}$ oscillation experiments.
