GeV Scale Asymmetric Dark Matter from Mirror Universe: Direct Detection and LHC Signatures

TL;DR

This paper explores a mirror universe model where GeV-scale asymmetric dark matter originates from mirror parity symmetry, analyzing its implications for direct detection experiments and Higgs signatures at the LHC.

Contribution

It introduces a model with spontaneous mirror parity violation, linking dark matter genesis with leptogenesis and predicting observable signals at experiments and colliders.

Findings

Mirror dark matter can be detected by TEXONO and CDEX.

Distinctive Higgs signatures are predicted at the LHC.

The model successfully explains matter-antimatter asymmetry via leptogenesis.

Abstract

Mirror universe is a fundamental way to restore parity symmetry in weak interactions. It naturally provides the lightest mirror nucleon as a unique GeV-scale asymmetric dark matter particle candidate. We conjecture that the mirror parity is respected by the fundamental interaction Lagrangian, and its possible soft breaking arises only from non-interaction terms in the gauge-singlet sector. We realize the spontaneous mirror parity violation by minimizing the vacuum Higgs potential, and derive the corresponding Higgs spectrum. We demonstrate that the common origin of CP violation in the visible and mirror neutrino seesaws can generate the right amount of matter and mirror dark matter via leptogenesis. We analyze the direct detections of GeV-scale mirror dark matter by TEXONO and CDEX experiments. We further study the predicted distinctive Higgs signatures at the LHC.