Threshold corrections to the radiative breaking of electroweak symmetry and neutralino dark matter in supersymmetric seesaw model

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.016011· OSTI ID:21409013

Kang, Sin Kyu ^[1]; Kato, Akina; Morozumi, Takuya; Yokozaki, Norimi ^[2]

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1. School of Liberal Arts, Seoul National University of Technology, Seoul 139-473 (Korea, Republic of)
2. Graduate School of Science, Hiroshima University, Higashi-Hiroshima, 739-8526 (Japan)

We study the radiative electroweak symmetry breaking and the relic abundance of neutralino dark matter in the supersymmetric type I seesaw model. In this model, there exist threshold corrections to Higgs bilinear terms coming from heavy singlet sneutrino loops, which make the soft supersymmetry breaking (SSB) mass for up-type Higgs shift at the seesaw scale and thus a minimization condition for the Higgs potential is affected. We show that the required fine-tuning between the Higgsino mass parameter {mu} and the SSB mass for up-type Higgs may be reduced at the electroweak scale, due to the threshold corrections. We also present how the parameter {mu} depends on the SSB B-parameter for heavy singlet sneutrinos. Since the property of neutralino dark matter is quite sensitive to the size of {mu}, we discuss how the relic abundance of neutralino dark matter is affected by the SSB B-parameter. Taking the SSB B-parameter of order of a few hundreds TeV, the required relic abundance of neutralino dark matter can be correctly achieved. In this case, dark matter is a mixture of bino and Higgsino, under the condition that gaugino masses are universal at the grand unification scale.

• OSTI ID: 21409013
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 1; Other Information: DOI: 10.1103/PhysRevD.81.016011; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
GRAND UNIFIED THEORY
HIGGS BOSONS
HIGGS MODEL
MASS
MINIMIZATION
MIXTURES
NONLUMINOUS MATTER
SIMULATION
SPARTICLES
SUPERSYMMETRY
SYMMETRY BREAKING
TEV RANGE
WEINBERG-SALAM GAUGE MODEL
BOSONS
DISPERSIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
MATHEMATICAL MODELS
MATTER
OPTIMIZATION
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
SYMMETRY
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES