Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses

Anderson, Greg W.; Baer, Howard; Chen, Chih‐Hao; Quintana, Pamela; Tata, Xerxes

doi:10.1103/physrevd.61.095005

Cited by 84 publications

(91 citation statements)

References 34 publications

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“…More generally, the gauge kinetic function need only transform at the symmetric product of two adjoints. In this more general case, if the auxiliary field that breaks supersymmetry also breaks the grand unification gauge symmetry, GUT scale gaugino mass parameters need not unify [48]. Non-unified masses also occur in models of gaugino-mediated SUSY breaking [49] and in various string-motivated models [50].…”

Section: Models With Non-universal Gaugino Massesmentioning

confidence: 99%

Collider signals and neutralino dark matter detection in relic-density-consistent models without universality

Baer

Mustafayev

Park

et al. 2008

J. High Energy Phys.

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We present brief synopses of supersymmetric models where either the neutralino composition or its mass is adjusted so that thermal relic neutralinos from the Big Bang saturate the measured abundance of cold dark matter in the universe. We first review minimal supergravity (mSUGRA), and then examine its various one-parameter extensions where we relax the assumed universality of the soft supersymmetry breaking parameters. Our goal is to correlate relic-density-allowed parameter choices with expected phenomena in direct, indirect and collider dark matter search experiments. For every non-universal model, we first provide plots to facilitate the selection of "dark-matter allowed" parameter space points, and then present salient features of each model with respect to searches at Tevatron, LHC and ILC and also direct and indirect dark matter searches. We present benchmark scenarios that allow one to compare and contrast the non-universal models with one another and with the paradigm mSUGRA framework. We show that many implications about sparticle properties and collider signals drawn from the analysis of the relic density constraint within mSUGRA do not carry over to simple one-parameter extensions of the mSUGRA framework. We find that in many relic-density-consistent models, there is one (or more) detectable edge in the invariant mass distribution of same-flavour, opposite sign dileptons in SUSY cascade decay events at the LHC. Finally, we scan the parameter space of these various models, requiring consistency with the LEP2 constraint on the chargino mass, and with the observed relic density, and examine prospects for direct and indirect dark matter detection. We find that in a large number of cases the mechanism that causes the early universe neutralino annihilation rate to be large (so as to produce the measured relic density) also enhances the direct detection rate, and often also the rates for indirect detection of neutralino dark matter.

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Section: Models With Non-universal Gaugino Massesmentioning

confidence: 99%

Collider signals and neutralino dark matter detection in relic-density-consistent models without universality

Baer

Mustafayev

Park

et al. 2008

J. High Energy Phys.

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“…Gauge invariance dictates that f must be contained within the symmetric product of two adjoints. It is usually assumed to be a singlet (see [867] for alternative possibilities within the context of GUT models and the resulting phenomenological implications).…”

Section: A2 Nonrenormalizable Modelsmentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

415

339

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After an introduction recalling the theoretical motivation for low energy (100 GeV to TeV scale) supersymmetry, this review describes the theory and experimental implications of the soft supersymmetry-breaking Lagrangian of the general minimal supersymmetric standard model (MSSM). Extensions to include neutrino masses and nonminimal theories are also discussed. Topics covered include models of supersymmetry breaking, phenomenological constraints from electroweak symmetry breaking, flavor/CP violation, collider searches, and cosmological constraints including dark matter and implications for baryogenesis and inflation.

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“…This topic has been discussed in several works (see for example, Refs. [19,20,21] and the references therein). For the present analysis we assume nonuniversality of gaugino masses and impose unification of gauge coupling constants at the GUT scale.…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…Specifically the SU(3), SU (2), and U(1) gaugino masses at the GUT scale for different representations have the following ratios [20]:…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Supersymmetric dark matter and Yukawa unification

2002

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An analysis of supersymmetric dark matter under the Yukawa unification constraint is given. The analysis utilizes the recently discovered region of the parameter space of models with gaugino mass nonuniversalities where large negative supersymmetric corrections to the b quark mass appear to allow b − τ unification for a positive µ sign consistent with the b → s + γ and g µ − 2 constraints. In the present analysis we use the revised theoretical determination of a SM µ (a µ = (g µ −2)/2) in computing the difference a exp µ −a SM µ which takes account of a reevaluation of the light by light contribution which has a positive sign. The analysis shows that the region of the parameter space with nonuniversalities of the gaugino masses which allows for unification of Yukawa couplings also contains regions which allow satisfaction of the relic density constraint. Specifically we find that the lightest neutralino mass consistent with the relic density constraint, bτ unification for SU(5) and b − t − τ unification for SO(10) in addition to other constraints lies in the region below 80 GeV. An analysis of the maximum and the minimum neutralino-proton scalar cross section for the allowed parameter space including the effect of a new determination of the pion-nucleon sigma term is also given. It is found that the full parameter space for this class of models can be explored in the next generation of proposed dark matter detectors.

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Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses

Cited by 84 publications

References 34 publications

Collider signals and neutralino dark matter detection in relic-density-consistent models without universality

Collider signals and neutralino dark matter detection in relic-density-consistent models without universality

The soft supersymmetry-breaking Lagrangian: theory and applications

Supersymmetric dark matter and Yukawa unification

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