Phases in the MSSM, electric dipole moments and cosmological dark matter

Toby Falk; Keith A. Olive; Mark Srednicki

doi:10.1016/0370-2693(95)00617-T

Phases in the MSSM, electric dipole moments and cosmological dark matter

Toby Falk, Keith A. Olive, Mark Srednicki

Physics and Astronomy (Twin Cities)

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Abstract

We consider the effect of CP violating phases in the MSSM on the relic density of the lightest supersymmetric particle (LSP). In particular, we find that the upper limits on the LSP mass are relaxed when phases in the MSSM are allowed to take non-zero values when the LSP is predominantly a gaugino (bino). Previous limits of m_B ≲ 250 GeV for Ωh² < 0.25 can be relaxed to m_B ≲ 650 GeV. We also consider the additional constraints imposed by the neutron and electron electric dipole moments induced by these phases. Though there is some restriction on the phases, the bino mass may still be as large as ∼ 350 GeV and certain phases can be arbitrarily large.

Original language	English (US)
Pages (from-to)	99-106
Number of pages	8
Journal	Physics Letters B
Volume	354
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(95)00617-T
State	Published - Jul 13 1995

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abstract = "We consider the effect of CP violating phases in the MSSM on the relic density of the lightest supersymmetric particle (LSP). In particular, we find that the upper limits on the LSP mass are relaxed when phases in the MSSM are allowed to take non-zero values when the LSP is predominantly a gaugino (bino). Previous limits of mB ≲ 250 GeV for Ωh2 < 0.25 can be relaxed to mB ≲ 650 GeV. We also consider the additional constraints imposed by the neutron and electron electric dipole moments induced by these phases. Though there is some restriction on the phases, the bino mass may still be as large as ∼ 350 GeV and certain phases can be arbitrarily large.",

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T1 - Phases in the MSSM, electric dipole moments and cosmological dark matter

AU - Falk, Toby

AU - Olive, Keith A.

AU - Srednicki, Mark

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N2 - We consider the effect of CP violating phases in the MSSM on the relic density of the lightest supersymmetric particle (LSP). In particular, we find that the upper limits on the LSP mass are relaxed when phases in the MSSM are allowed to take non-zero values when the LSP is predominantly a gaugino (bino). Previous limits of mB ≲ 250 GeV for Ωh2 < 0.25 can be relaxed to mB ≲ 650 GeV. We also consider the additional constraints imposed by the neutron and electron electric dipole moments induced by these phases. Though there is some restriction on the phases, the bino mass may still be as large as ∼ 350 GeV and certain phases can be arbitrarily large.

AB - We consider the effect of CP violating phases in the MSSM on the relic density of the lightest supersymmetric particle (LSP). In particular, we find that the upper limits on the LSP mass are relaxed when phases in the MSSM are allowed to take non-zero values when the LSP is predominantly a gaugino (bino). Previous limits of mB ≲ 250 GeV for Ωh2 < 0.25 can be relaxed to mB ≲ 650 GeV. We also consider the additional constraints imposed by the neutron and electron electric dipole moments induced by these phases. Though there is some restriction on the phases, the bino mass may still be as large as ∼ 350 GeV and certain phases can be arbitrarily large.

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Phases in the MSSM, electric dipole moments and cosmological dark matter

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