High Energy Physics - Phenomenology
[Submitted on 2 Jul 2018
]
Title: Effects of quantum statistics on relic density of Dark Radiation
Title: 量子统计对暗辐射遗迹密度的影响
Abstract: The freeze-out of massless particles is investigated. The effects due to quantum statistics, Fermi-Dirac or Bose-Einstein, of all particles relevant for the process are analyzed. Solutions of appropriate Boltzmann equation are compared with those obtained using some popular approximate methods. As an application of general results the relic density of dark radiation in Weinberg's Higgs portal model is discussed.
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