Cosmologically Viable Low-energy Supersymmetry Breaking

Abstract

A recent cosmological bound on the gravitino mass, $m_{3/2}<4.7$ eV, together with LHC results on the Higgs mass and direct searches, excludes minimal gauge mediation with high reheating temperatures. We discuss a minimal, vector-mediated model which incorporates the seesaw mechanism for neutrino masses, allows for thermal leptogenesis, ameliorates the $\mu$ problem, and achieves the observed Higgs mass and a gravitino as light as $1$-$2$ eV.

arXiv comment7+3 pages, 6 figures; v2: clarified color triplet decay interactions, discussed $\chi$ and $v_S$ origins, fixed minor typos, published in Phys Rev D

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• Cosmological Constraints on Light (but Massive) Relics
• Finding eV-scale Light Relics with Cosmological Observables
• A two-component vector WIMP -- fermion FIMP dark matter model with an extended seesaw mechanism
• Ripples in Spacetime from Broken Supersymmetry
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• The Muon Smasher's Guide
• Non-thermal Leptogenesis after Majoron Hilltop Inflation
• Gravitino constraints on supergravity inflation
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• Leptogenesis from composite singlets
• Interactions of exotic neutralino dark matter with nucleons in $U(1)$ extensions of the MSSM originating from $E_6$ GUTs