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arXiv · 1701.02175

Relaxation leptogenesis, isocurvature perturbations, and the cosmic infrared background

Masahiro Kawasaki·Alexander Kusenko·Lauren Pearce·Louis Yang
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Abstract

Observations of cosmic infrared background (CIB) radiation exhibit significant fluctuations on small angular scales. A number of explanations have been put forth, but there is currently no consensus on the origin of these large fluctuations. We consider the possibility that small-scale fluctuations in matter-antimatter asymmetry could lead to variations in star formation rates which are responsible for the CIB fluctuations. We show that the recently proposed Higgs relaxation leptogenesis mechanism can produce such small-scale baryonic isocurvature perturbations which can explain the observed excess in the CIB fluctuations.

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Masahiro Kawasaki, Alexander Kusenko, Lauren Pearce, Louis Yang. 2017-01-09. Relaxation leptogenesis, isocurvature perturbations, and the cosmic infrared background. https://doi.org/10.1103/physrevd.95.103006

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