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Title: Supersymmetric extra U(1) models with a singlino-dominated lightest superparticle

Abstract

We investigate phenomenology related to the neutral fields in supersymmetric models with an extra U(1) derived from E{sub 6}. Our study is concentrated on the models which have a singlino-dominated neutralino as the lightest superparticle (LSP). If such models satisfy a constraint for dark matter derived from the WMAP data, the lightest neutral Higgs scalar, a new neutral gauge field Z{sup '}, and the LSP may be interesting targets for the study at the LHC. We also discuss features of the Z{sup '} in the models and its detectability at the LHC.

Authors:
;  [1]
  1. Institute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192 (Japan)
Publication Date:
OSTI Identifier:
21020089
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.055004; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; HIGGS BOSONS; HIGGS MODEL; NONLUMINOUS MATTER; PARTICLE IDENTIFICATION; SCALARS; SPARTICLES; STANDARD MODEL; SUPERSYMMETRY; U-1 GROUPS; UNITARY SYMMETRY; Z NEUTRAL BOSONS

Citation Formats

Nakamura, Satoshi, and Suematsu, Daijiro. Supersymmetric extra U(1) models with a singlino-dominated lightest superparticle. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.055004.
Nakamura, Satoshi, & Suematsu, Daijiro. Supersymmetric extra U(1) models with a singlino-dominated lightest superparticle. United States. doi:10.1103/PHYSREVD.75.055004.
Nakamura, Satoshi, and Suematsu, Daijiro. Thu . "Supersymmetric extra U(1) models with a singlino-dominated lightest superparticle". United States. doi:10.1103/PHYSREVD.75.055004.
@article{osti_21020089,
title = {Supersymmetric extra U(1) models with a singlino-dominated lightest superparticle},
author = {Nakamura, Satoshi and Suematsu, Daijiro},
abstractNote = {We investigate phenomenology related to the neutral fields in supersymmetric models with an extra U(1) derived from E{sub 6}. Our study is concentrated on the models which have a singlino-dominated neutralino as the lightest superparticle (LSP). If such models satisfy a constraint for dark matter derived from the WMAP data, the lightest neutral Higgs scalar, a new neutral gauge field Z{sup '}, and the LSP may be interesting targets for the study at the LHC. We also discuss features of the Z{sup '} in the models and its detectability at the LHC.},
doi = {10.1103/PHYSREVD.75.055004},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}
  • We consider a singlino-dominated neutralino in supersymmetric models with an extra U(1). In case both the {mu} term and also the Z{sup '} mass are generated by the vacuum expectation value of the scalar component of the same singlet chiral superfield, generically the lightest neutralino is not expected to be dominated by the singlino. However, if the gaugino corresponding to the extra U(1) is sufficiently heavy, the lightest neutralino can be dominated by the singlino and still satisfy the constraints resulting from the Z{sup '} phenomenology. We assume a supersymmetry breaking scenario in which the extra U(1) gaugino can bemore » much heavier than other gauginos. In that framework we show that the singlino-dominated lightest neutralino may be a good candidate for dark matter in a parameter space where various phenomenological constraints are satisfied.« less
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  • The totality of neutrino-oscillation phenomena appears to require the existence of a light singlet neutrino. As pointed out recently, this can be naturally accommodated with a specific extra U(1) factor contained in the superstring-inspired E{sub 6} model and its implied particle spectrum. We analyze this model for other possible consequences. We discuss specifically the oblique corrections from {ital Z}-{ital Z}{sup {prime}} mixing, the phenomenology of the two-Higgs-doublet sector, and the associated neutralino sector, as well as possible scenarios of gauge-coupling unification. {copyright} {ital 1996 The American Physical Society.}