Abstract
Three main strategies are being pursued to search for nongravitational dark matter signals: direct detection, indirect detection and collider searches. Interestingly, experiments have reached sensitivities in these three search strategies which may allow detection in the near future. In order to take full benefit of the wealth of experimental data, and in order to confirm a possible dark matter signal, it is necessary to specify the nature of the dark matter particle and of the mediator to the Standard Model. In this paper, we focus on a simplified model where the dark matter particle is a Majorana fermion that couples to a light Standard Model fermion via a Yukawa coupling with a scalar mediator. We review the observational signatures of this model and we discuss the complementarity among the various search strategies, with emphasis in the well motivated scenario where the dark matter particles are produced in the early universe via thermal freeze-out.
Highlights
Since Zwicky conjectured the existence of dark matter[1] (DM) to explain his own observations on the dynamics of galaxies in the Coma Cluster,[2] a lot of effort has been invested in determining the properties of this new form of matter
We focus on a simplified model where the dark matter particle is a Majorana fermion that couples to a light Standard Model fermion via a Yukawa coupling with a scalar mediator
In this review we focus in scenarios where the dark matter particle is a Majorana fermion with mass in the range ∼ 10 − 104 GeV that couples to a light Standard Model (SM) fermion via a Yukawa coupling with a scalar mediator
Summary
Since Zwicky conjectured the existence of dark matter[1] (DM) to explain his own observations on the dynamics of galaxies in the Coma Cluster,[2] a lot of effort has been invested in determining the properties of this new form of matter. Given the intrinsic complexity of searching for a particle with unknown properties in an experiment with large and, in some instances, poorly understood backgrounds, it is of paramount importance to theoretically identify the cleanest and most powerful search strategy, as well as the synergies among the various strategies. This program, relies heavily on the details of the model. In this review we focus in scenarios where the dark matter particle is a Majorana fermion with mass in the range ∼ 10 − 104 GeV that couples to a light Standard Model (SM) fermion via a Yukawa coupling with a scalar mediator. Appendix A contains a collection of relevant cross sections and Appendix B a discussion of effective operators for direct detection
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