Leptophobic dark matter and the baryon number violation scale

Abstract

We discuss the possible connection between the scale for baryon number violation and the cosmological bound on the dark matter relic density. A simple gauge theory for baryon number which predicts the existence of a leptophobic cold dark matter particle candidate is investigated. In this context, the dark matter candidate is a Dirac fermion with mass defined by the new symmetry breaking scale. Using the cosmological bounds on the dark matter relic density we find the upper bound on the symmetry breaking scale around 200 TeV. The properties of the leptophobic dark matter candidate are investigated in great detail and we show the prospects to test this theory at current and future experiments. We discuss the main implications for the mechanisms to explain the matter and antimatter asymmetry in the Universe. *

Anomaly-free dark matter models

“…In Ref. [24] we have discussed in detail the experimental bounds on M Z B and θ B . In the next section we will discuss the impact of the cosmological bounds and the possibility to find an upper bound on the symmetry breaking scale.…”

“…In Ref. [24] we have pointed out the need to impose the perturbative bounds on the scalar couplings in the Higgs sector,…”

“…for more details see Ref. [24]. For consistency of our calculation, the gauge coupling g B must remain perturbative.…”

“…The Z B mediator has direct coupling to quarks and would appear as a resonance in dijet searches at the LHC. In our work, we apply the bounds from CMS and ATLAS [24] and present the excluded regions in purple bands in Figs. 2 and 3.…”

Multilepton dark matter signals

“…In section 2 we write down the model and the interactions of the dark leptons. The 1 For related work see [25][26][27]. constraints on the model parameters from dark matter relic density and direct detection are examined in section 3.…”