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arXiv:1204.4186hep-ph

Matter and Antimatter in the Universe

Laurent Canetti, Marco Drewes, Mikhail Shaposhnikov

Abstract

We review observational evidence for a matter-antimatter asymmetry in the early universe, which leads to the remnant matter density we observe today. We also discuss observational bounds on the presence of antimatter in the present day universe, including the possibility of a large lepton asymmetry in the cosmic neutrino background. We briefly review the theoretical framework within which baryogenesis, the dynamical generation of a matter-antimatter asymmetry, can occur. As an example, we discuss a testable minimal model that simultaneously explains the baryon asymmetry of the universe, neutrino oscillations and dark matter.

arXiv comments
Invited contribution to the New Journal of Physics Focus Issue "Origin of Matter" (New J. Phys. 14 (2012) 095012); this version is identical to the published article up to a few updates in the references
Journal reference
New J. Phys. 14 (2012) 095012
DOI
doi:10.1088/1367-2630/14/9/095012
Subjects
hep-phHigh Energy Physics, Phenomenology astro-ph.COCosmology and Nongalactic Astrophysics

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Discussed in comments2 threads

  1. Neutrino Asymmetry Passes Critical Threshold 1 comment
  2. Do Neutrinos Explain Matter-Antimatter Asymmetry? 1 comment

    • Your idea is something which has been studied pretty intensively for decades; it's that there are huge and distinct regions of antimatter with vanishing baryon number B = 0 and that these have existed since at least the start of early structure formation, thus hoping to avoid…

      raattgiftView on HNParent context

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