Dark matter in the MSSM golden region

Journal Article · Sun Feb 15 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.045020· OSTI ID:21260033

Kasahara, Junya; Gondolo, Paolo ^[1]; Freese, Katherine ^[2]

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1. Department of Physics, University of Utah, 115 South 1400 East, Suite 201, Salt Lake City, Utah 84112-0830 (United States)
2. Michigan Center for Theoretical Physics, Physics Department, University of Michigan, Ann Arbor, Michigan 48109 (United States)

Dark matter is examined within the 'golden region' of the minimal supersymmetric standard model. This region satisfies experimental constraints, including a lower bound on the Higgs mass of 114 GeV, and minimizes fine-tuning of the Z boson mass. Here we impose additional constraints (particularly due to experimental bounds on b{yields}s{gamma}). Then we find the properties of the dark matter in this region. Neutralinos with a relic density that provides the amount of dark matter required by cosmological data are shown to consist of a predominant gaugino (rather than Higgsino) fraction. In addition, the U(1){sub Y} gaugino mass parameter must satisfy M{sub 1} < or approx. 300 GeV.

• OSTI ID: 21260033
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 4; Other Information: DOI: 10.1103/PhysRevD.79.045020; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DENSITY
GEV RANGE 100-1000
HIGGS BOSONS
HIGGS MODEL
MASS
NONLUMINOUS MATTER
STANDARD MODEL
SUPERSYMMETRY
U-1 GROUPS
Z NEUTRAL BOSONS