Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-08-29
Phys.Rev.D78:111701,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages; v2: Fixed minor typo, added short discussion of application to PAMELA and appropriate references, results unchanged
Scientific paper
10.1103/PhysRevD.78.111701
The properties of the dark matter that determine its thermal relic abundance can be very different from the dark matter properties today. We investigate this possibility by coupling a dark matter sector to a scalar that undergoes a phase transition after the dark matter freezes out. If the value of Omega_DM h^2 calculated from parameters measured at colliders and by direct and indirect detection experiments does not match the astrophysically observed value, a novel cosmology of this type could provide the explanation. This mechanism also has the potential to account for the "boost factor" required to explain the PAMELA data.
Cohen Timothy
Morrissey David E.
Pierce Aaron
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