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Baryogenesis from a modulus dominated universe

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Published 14 February 2020 © 2020 IOP Publishing Ltd and Sissa Medialab
, , Citation Gordon Kane and Martin Wolfgang Winkler JCAP02(2020)019 DOI 10.1088/1475-7516/2020/02/019

1475-7516/2020/02/019

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.

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10.1088/1475-7516/2020/02/019