Freeze-in production of FIMP dark matter

• DOI: 10.1007/jhep03(2010)080
• Publication Date: 2010-03-16T20:01:06Z
• Authors: Lawrence J. Hall; Karsten Jedamzik; John March-Russell; Stephen M. West
• Keywords: Hidden sector

We propose an alternate, calculable mechanism of dark matter genesis, "thermal freeze-in," involving a Feebly Interacting Massive Particle (FIMP) interacting so feebly with the thermal bath that it never attains equilibrium. As conventional freeze-out" production mechanism, relic abundance reflects combination initial distributions together particle masses and couplings can be measured in laboratory or astrophysically. The freeze-in yield is IR dominated by low temperatures near FIMP mass independent unknown UV physics, such as reheat temperature after inflation. Moduli modulinos string theory compactifications receive from weak-scale supersymmetry breaking provide implementations do models employ Dirac neutrino GUT-scale-suppressed interactions. Experimental signals FIMPs spectacular, including new metastable coloured charged particles at LHC well alteration big bang nucleosynthesis.