We study the anapole moment of the lightest neutralino in the constrained
Minimal Supersymmetric Standard Model (cMSSM). The electromagnetic anapole is
the only allowed electromagnetic form factor for Majorana fermions, such as the
neutralino. Since the neutralino is the LSP in many versions of the MSSM and
therefore a candidate for dark matter, its characterization through its
electromagnetic properties is important both for particle physics and for
cosmology. We perform a scan in the parameter space of the cMSSM and find that
the anapole moment is different from zero albeit very small ($< 10^{-3}$
GeV$^{-2}$). Combined with experimental constraints like the Higgs mass and the
DM relic density, the allowed region of parameter space lies within the reach
of future direct DM searches. Thus, the anapole moment could be used as a
complementary constraint when studying the parameter space of the cMSSM and
other similar models.Comment: 22 pages, 13 figures. arXiv admin note: substantial text overlap with
arXiv:1206.505
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