No-scale scenario with nonuniversal gaugino masses

Komine, Shinji; Yamaguchi, Masahiro

doi:10.1103/physrevd.63.035005

Cited by 30 publications

(31 citation statements)

References 60 publications

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“…If gaugino masses are universal at M c = M GUT , it is rather difficult that the LSP is a neutral particle [48,49]. One can avoid this difficulty either by assuming M c > M GUT or non-universal gaugino masses [48,49].…”

Section: No-scale or Gaugino Mediationmentioning

confidence: 99%

Probing the messenger of supersymmetry breaking by the muon anomalous magnetic moment

et al. 2001

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Motivated by the recently measured muon's anomalous magnetic moment a µ , we examine the supersymmetry contribution to a µ in various mediation models of supersymmetry breaking which lead to predictive flavor conserving soft parameters at high energy scale. The studied models include dilaton/modulus-mediated models in heterotic string/M theory, gaugemediated model, no-scale or gaugino-mediated model, and also the minimal and deflected anomaly-mediated models. For each model, the range of a SUSY µ allowed by other experimental constraints, e.g. b → sγ and the collider bounds on superparticle masses, is obtained together with the corresponding parameter region of the model. Gauge-mediated models with low messenger scale can give any a SUSY µ within the 2σ bound. In many other models, b → sγ favors a SUSY µ smaller than either the −1σ value (26 × 10 −10 ) or the central value (42 × 10 −10 ).

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Section: No-scale or Gaugino Mediationmentioning

confidence: 99%

Probing the messenger of supersymmetry breaking by the muon anomalous magnetic moment

et al. 2001

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“…Eq. (3.6) is zero at M G if we impose the noscale boundary condition, but it is nonzero (and negative for particles with 6 Here, we consider the case where the SO(10) gauge group breaks down into the gauge groups SU(3)C×SU(2)L ×U(1)Y ×U(1)5 in a single step at the scale MG.…”

Section: Su(5)×u(1) 5 Modelmentioning

confidence: 99%

“…However, it was shown recently that the minimal noscale model with M X = M G is actually not consistent with phenomenological bounds [5,6,7], mainly due to the lower bound on the Higgs boson mass and the cosmological requirement that a charged particle (in particular stau) is not the lightest SUSY particle (LSP). There might be several ways to reconcile the noscale boundary condition with these phenomenological bounds, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of no-scale supersymmetry breaking models with a gaugedU(1)B−Lsymmetry

Fujii¹,

Suzuki²

2002

Phys. Rev. D

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Noscale supersymmetry (SUSY) breaking model is investigated in the minimal extension of the minimal supersymmetric standard model (MSSM) with a gauged U(1) B−L symmetry. We specifically consider a unification-inspired model with the gauge groups SU(3) C ×SU(2) L ×U(1) Y ×U(1) B−L ⊂SU(5)× U(1) 5 for illustration. While the noscale boundary condition at the grand unification scale (M G ≃ 2 × 10 16 GeV) in the MSSM is not consistent with phenomenological constraints, we show that it is if the gaugino of the U(1) 5 multiplet is several times heavier than the gauginos of the MSSM. However, if SU(5)×U(1) 5 is further embedded in a larger simple group, e.g. SO(10), the noscale boundary condition at M G is inconsistent with phenomenological constraints. If we relax the noscale boundary condition and allow non-zero soft scalar masses for the Higgs fields which spontaneously break the U(1) 5 symmetry, the resultant spectrum of SUSY particles becomes consistent with all the phenomenological constraints, even if we impose the GUT relation on the gauge coupling and the gaugino mass of the U(1) 5 . In this case, the SUSY CP problem is also solved, since the condition Bµ = 0 at the boundary can be imposed consistently with the electroweak symmetry breaking.

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“…Expressing m 2 H 2 at the right hand side in terms of the GUT scale mass parameters at a representative value of tan β = 10 gives [14,15] …”

Section: Non-universal Gaugino Mass Modelmentioning

confidence: 99%

Higgsino dark matter in a supergravity model with nonuniversal gaugino masses

2003

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We study a specific SUGRA model with nonuniversal gaugino masses as an alternative to the minimal SUGRA model in the context of supersymmetric dark matter. The lightest supersymmetric particle in this model comes out to be a Higgsino dominated instead of a bino dominated lightest neutralino. The thermal relic density of this Higgsino dark matter is somewhat lower than the cosmologically favoured range, which means it may be only a subdominant component of the cold dark matter. Nonetheless, it predicts favourable rates of indirect detection, which can be seen in square-km size neutrino telescopes.

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No-scale scenario with nonuniversal gaugino masses

Cited by 30 publications

References 60 publications

Probing the messenger of supersymmetry breaking by the muon anomalous magnetic moment

Probing the messenger of supersymmetry breaking by the muon anomalous magnetic moment

Investigation of no-scale supersymmetry breaking models with a gaugedU(1)B−Lsymmetry

Higgsino dark matter in a supergravity model with nonuniversal gaugino masses

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