Composite Twin Dark Matter

Abstract

We consider Fraternal Twin Higgs models where the twin bottom quark, $b^{\prime }$, is much heavier than the twin confinement scale. In this limit aspects of quark bound states, like the mass and binding energy, can be accurately calculated. We show that in this regime, dark matter can be primarily made of twin baryons containing $b^{\prime }{b}^{\prime }{b}^{\prime }$ or, when twin hypercharge is gauged, twin atoms, composed of a baryon bound to a twin ${\tau }^{\prime }$ lepton. We find that there are significant regions of parameter space which are allowed by current constraints but within the realm of detection in the near future. The case with twin atoms can alleviate the tension between dark matter properties inferred from dwarf galaxies and clusters.

21 pages, 5 figures; expanded discussion of bounds

References in corpus (10)

• A direct empirical proof of the existence of dark matter
• The non-gravitational interactions of dark matter in colliding galaxy clusters
• Neutral Naturalness from the Orbifold Higgs
• Colorless Top Partners, a 125 GeV Higgs, and the Limits on Naturalness
• Minimal Mirror Twin Higgs
• Hidden Sector Hydrogen as Dark Matter: Small-scale Structure Formation Predictions and the Importance of Hyperfine Interactions
• Mirror World at the Large Hadron Collider
• The Dark Top
• Effective Theory of Flavor for Minimal Mirror Twin Higgs
• Discovering the Twin Higgs Boson with Displaced Decays