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arXiv · hep-ph/9209292

Neutralino Dark Matter in a Class of Unified Theories

S. A. Abel·S. Sarkar·I. B. Whittingham
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Abstract

The cosmological significance of the neutralino sector is studied for a class of models in which electroweak symmetry breaking is seeded by a gauge singlet. Extensive use is made of the renormalisation group equations to significantly reduce the parameter space, by deriving analytic expressions for all the supersymmetry-breaking couplings in terms of the universal gaugino mass $m_{1/2}$, the universal scalar mass $m_0$ and the coupling $A$. The composition of the LSP is determined exactly below the W mass, no approximations are made for sfermion masses, and all particle exchanges are considered in calculating the annihilation cross-section; the relic abundance is then obtained by an analytic approximation. We find that in these models, stable neutralinos may make a significant contribution to the dark matter in the universe.

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S. A. Abel, S. Sarkar, I. B. Whittingham. 1992-09-29. Neutralino Dark Matter in a Class of Unified Theories. https://doi.org/10.1016/0550-3213(93)90198-x

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