Mixed Dark Matter in Left-Right Symmetric Models
  Motivated by the recently reported diboson and dijet excesses in Run 1 data
at ATLAS and CMS, we explore models of mixed dark matter in left-right
symmetric theories. In this study, we calculate the relic abundance and the
elastic scattering cross section with nuclei for a number of dark matter
candidates that appear within the fermionic multiplets of left-right symmetric
models. In contrast to the case of pure multiplets, WIMP-nucleon scattering
proceeds at tree-level, and hence the projected reach of future direct
detection experiments such as LUX-ZEPLIN and XENON1T will cover large regions
of parameter space for TeV-scale thermal dark matter. Decays of the heavy
charged W' boson to particles in the dark sector can potentially shift the
right-handed gauge coupling to larger values when fixed to the rate of the Run
1 excesses, moving towards the theoretically attractive scenario, gR = gL. This
region of parameter space may be probed by future collider searches for new
Higgs bosons or electroweak fermions.
