Baryogenesis from a Modulus Dominated Universe

Abstract

String/ M-theory compactifications predict the existence of a modulus field with a mass of 100-10000 TeV. Its decay at MeV-temperatures generates large amounts of entropy and washes out any previously produced baryon asymmetry. We describe how the baryon asymmetry can be (re)generated by the modulus decay. The mechanism relates the smallness of the asymmetry to the hierarchy between the Planck- and the Fermi-scale.

16 pages, 4 figures

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Cited by in corpus (5)

• Precision Early Universe Thermodynamics made simple: $N_{\mathrm{eff}}$ and Neutrino Decoupling in the Standard Model and beyond
• Energy Spectrum of Thermalizing High Energy Decay Products in the Early Universe
• Light Dark Matter from Entropy Dilution
• The cosmological moduli problem and naturalness
• Quark and lepton mass matrices from localization in M-theory on $G_2$ orbifold