A published asymmetric dark matter mechanism from semi-annihilation is shown to violate unitarity; a corrected two-species model with long-lived final states can produce the observed relic density.
Mass-derivative relations for leptogenesis
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abstract
In this work, a diagrammatic representation of thermal mass effects is derived from the $S$-matrix unitarity both in the classical and quantum Boltzmann equations. Within the example of the seesaw type-I leptogenesis, we discuss the connection of the Higgs thermal mass and the cancelations of infrared divergences in zero- and finite-temperature calculations of the right-handed neutrino decay and scattering processes.
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Asymmetric dark matter from semi-annihilation: unitarity constraints and long-lived final states
A published asymmetric dark matter mechanism from semi-annihilation is shown to violate unitarity; a corrected two-species model with long-lived final states can produce the observed relic density.