Toroidal dipole moment of the lightest neutralino in the cMSSM

Abstract

We study the toroidal dipole moment of the lightest neutralino in the constrained Minimal Supersymmetric Standard Model. The toroidal dipole moment is the only electromagnetic property of 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 toroidal dipole moment is different from zero, albeit very small, in all the parameter space, and reaches a value around $10^{-3}{\mathrm{GeV}}^{-2}$ in a particular region of the parameter space, well below experimental bounds.

Comments: 21 pages, 12 figures