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We present a novel mechanism for generating both the baryon and dark matter densities of the Universe. A new Dirac fermion X carrying a conserved baryon number charge couples to the standard model quarks as well as a GeV-scale hidden sector. CP-violating decays of X, produced nonthermally in low-temperature reheating, sequester antibaryon number in the(More)
In addition to explaining the masses of elementary particles, the Higgs boson may have far-reaching implications for the generation of the matter content in the Universe. For instance, the Higgs boson plays a key role in two main theories of baryogenesis, namely, electroweak baryogenesis and leptogenesis. In this Letter, we propose a new cosmological(More)
We compute supersymmetric contributions to pion leptonic (π l2) decays in the Minimal Super-symmetric Standard Model (MSSM). When R-parity is conserved, the largest contributions to the ratio R e/µ ≡ Γ[π + → e + νe(γ)]/Γ[π + → µ + νµ(γ)] arise from one-loop (V − A) ⊗ (V − A) corrections. These contributions can be potentially as large as the sensitivities(More)
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Electroweak baryogenesis (EWBG) in extensions of the standard model will be(More)
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