Non-perturbative Effect on Thermal Relic Abundance of Dark Matter

Details Non-perturbative Effect on Thermal Relic Abundance of Dark Matter Non-perturbative Effect on Thermal Relic Abundance of Dark Matter

2006-10-19

arxiv.org/abs/hep-ph/0610249v1

Phys.Lett.B646:34-38,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures

Scientific paper

10.1016/j.physletb.2007.01.012

We point out that thermal relic abundance of the dark matter is strongly altered by a non-perturbative effect called the Sommerfeld enhancement, when constituent particles of the dark matter are non-singlet under the SU(2)_L gauge interaction and much heavier than the weak gauge bosons. Typical candidates for such dark matter particles are the heavy wino- and higgsino-like neutralinos. We investigate the non-perturbative effect on the relic abundance of dark matter for the wino-like neutralino as an example. We show that its thermal abundance is reduced by 50% compared to the perturbative result. The wino-like neutralino mass consistent with the observed dark matter abundance turns out to be 2.7 TeV < m < 3.0 TeV.

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