Regular Article - Theoretical Physics
Minimal spin-3/2 dark matter in a simple s-channel model
National Institute for Theoretical Physics, School of Physics and Mandelstam Institute for Theoretical Physics, University of the Witwatersrand, Wits, Johannesburg, 2050, South Africa
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Accepted: 22 December 2016
Published online: 13 January 2017
We consider a spin-3/2 fermionic dark matter candidate (DM) interacting with Standard Model fermions through a vector mediator in the s-channel. We find that for pure vector couplings almost the entire parameter space of the DM and mediator mass consistent with the observed relic density is ruled out by the direct detection observations through DM-nucleon elastic scattering cross sections. In contrast, for pure axial-vector coupling, the most stringent constraints are obtained from monojet searches at the Large Hadron Collider.
© The Author(s), 2017