Journal
NUCLEAR PHYSICS B
Volume 882, Issue -, Pages 145-170Publisher
ELSEVIER
DOI: 10.1016/j.nuclphysb.2014.02.012
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Funding
- Gottfried Wilhelm Leibniz programme of the Deutsche Forschungsgemeinschaft
- D.F.G. Cluster of Excellence 'Origin and Structure of the Universe'
- U.S. Department of Energy [DE-FG02-08ER41531]
- Wisconsin Alumni Research Foundation
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By including all leading quantum-statistical effects at finite temperature, we show that no net asymmetry of leptons and sleptons is generated from soft leptogenesis, save the possible contribution from the resonant mixing of sneutrinos. This result contrasts with different conclusions appearing in the literature that are based on an incomplete inclusion of quantum statistics. We discuss vertex and wave-function diagrams as well as all different possible kinematic cuts that nominally lead to CP-violating asymmetries. The present example of soft leptogenesis may therefore serve as a paradigm in order to identify more generally applicable caveats relevant to alternative scenarios for baryogenesis and leptogenesis, and it may provide useful guidance in constructing viable models. (C) 2014 The Authors. Published by Elsevier B.V.
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