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Neutralino dark matter with inert higgsinos and singlinos

Neutralino dark matter with inert higgsinos and singlinos
Neutralino dark matter with inert higgsinos and singlinos
We discuss neutralino dark matter arising from supersymmetric models with extra inert Higgsinos and singlinos, where inert means that their scalar partners do not get vacuum expectation values. As an example, we consider the extended neutralino sector of the E6SSM, which predicts three families of Higgs doublet pairs, plus three singlets, plus a Z', together with their fermionic superpartners. We show that the two families of inert doublet Higgsinos and singlinos predicted by this model provide an almost decoupled neutralino sector with a naturally light LSP which can account for the cold dark matter relic abundance independently of the rest of the model, providing that the ratio of the two usual Higgs doublets satisfies tan ? < 2.

88
Hall, J.M.
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King, Stephen F
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Hall, J.M.
0acf1244-a522-44ec-a305-3c4cff5bb1e8
King, Stephen F
f8c616b7-0336-4046-a943-700af83a1538

Hall, J.M. and King, Stephen F (2009) Neutralino dark matter with inert higgsinos and singlinos. Journal of High Energy Physics, 2009 (JHEP08), 88. (doi:10.1088/1126-6708/2009/08/088).

Record type: Article

Abstract

We discuss neutralino dark matter arising from supersymmetric models with extra inert Higgsinos and singlinos, where inert means that their scalar partners do not get vacuum expectation values. As an example, we consider the extended neutralino sector of the E6SSM, which predicts three families of Higgs doublet pairs, plus three singlets, plus a Z', together with their fermionic superpartners. We show that the two families of inert doublet Higgsinos and singlinos predicted by this model provide an almost decoupled neutralino sector with a naturally light LSP which can account for the cold dark matter relic abundance independently of the rest of the model, providing that the ratio of the two usual Higgs doublets satisfies tan ? < 2.

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Published date: August 2009
Organisations: High Energy Physics

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Local EPrints ID: 144121
URI: http://eprints.soton.ac.uk/id/eprint/144121
PURE UUID: 75f6900b-5b24-4d93-b673-11b35643a7d1

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Date deposited: 26 Apr 2011 13:02
Last modified: 14 Aug 2019 19:03

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Author: J.M. Hall
Author: Stephen F King

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