MSSM4G: Reviving Bino Dark Matter with Vector-like 4th Generation Particles

Abstract

We supplement the minimal supersymmetric standard model (MSSM) with vector-like copies of standard model particles. Such 4th generation particles can raise the Higgs boson mass to the observed value without requiring very heavy superpartners, improving naturalness and the prospects for discovering supersymmetry at the LHC. Here we show that these new particles are also motivated cosmologically: in the MSSM, pure Bino dark matter typically overcloses the Universe, but 4th generation particles open up new annihilation channels, allowing Binos to have the correct thermal relic density without resonances or co-annihilation. We show that this can be done in a sizable region of parameter space while preserving gauge coupling unification and satisfying constraints from collider, Higgs, precision electroweak, and flavor physics.

16 pages, 3 figures

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Cited by in corpus (6)

• Heavy Bino Dark Matter and Collider Signals in the MSSM with Vector-like 4th-Generation Particles
• The WIMP Paradigm: Theme and Variations
• Exploring vector-like supersymmetric extensions of the Standard Model with dark matter and colliders
• Dark Matter and the Higgs in Natural SUSY
• Vector-Like Top Quark Production via an Electroweak Dipole Moment at a Muon Collider
• The Two Scales of New Physics in Higgs Couplings