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arXiv · astro-ph/0103452

Kinetic decoupling of neutralino dark matter

Xuelei Chen·Marc Kamionkowski·Xinmin Zhang
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Abstract

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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Xuelei Chen, Marc Kamionkowski, Xinmin Zhang. 2001-06-08. Kinetic decoupling of neutralino dark matter. https://doi.org/10.1103/physrevd.64.021302

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