Kinetic decoupling of neutralino dark matter

Details Kinetic decoupling of neutralino dark matter Kinetic decoupling of neutralino dark matter

2001-03-27

arxiv.org/abs/astro-ph/0103452v2

Phys.Rev.D64:021302,2001

Astronomy and Astrophysics

Astrophysics

Replaced with revised version, new references added

Scientific paper

10.1103/PhysRevD.64.021302

After neutralinos cease annihilating in the early Universe, they may still scatter elastically from other particles in the primordial plasma. At some point in time, however, they will eventually stop scattering. We calculate the cross sections for neutralino elastic scattering from standard-model particles to determine the time at which this kinetic decoupling occurs. We show that kinetic decoupling occurs above a temperature $T\sim$ MeV. Thereafter, neutralinos act as collisionless cold dark matter.

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