No-scale supersymmetric GUTs

Ellis, Jonathan Richard; Kounnas, Costas; Nanopoulos, Dimitri V.

doi:10.1016/0550-3213(84)90555-8

Cited by 531 publications

(447 citation statements)

References 28 publications

Supporting

Mentioning

438

Contrasting

Order By: Relevance

“…It is difficult to maintain m 3/2 ∼ M W in no-scale models if there are other larger scales in the theory because of the radiative corrections these contribute to the effective potential for m 3/2 [27]. If such large scales exist, such as in a GUT, the heavy sector must be completely sequestered from the supersymmetry breaking, since in the supersymmetric limit, they do not alter the effective potential.…”

Section: Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Higgs boson exempt no-scale supersymmetry and its collider and cosmology implications

2007

View full text Add to dashboard Cite

One of the most straightforward ways to address the flavor problem of low-energy supersymmetry is to arrange for the scalar soft terms to vanish simultaneously at a scale M c much larger than the electroweak scale. This occurs naturally in a number of scenarios, such as no-scale models, gaugino mediation, and several models with strong conformal dynamics. Unfortunately, the most basic version of this approach that incorporates gaugino mass unification and zero scalar masses at the grand unification scale is not compatible with collider and dark matter constraints. However, experimental constraints can be satisfied if we exempt the Higgs bosons from flowing to zero mass value at the high scale. We survey the theoretical constructions that allow this, and investigate the collider and dark matter consequences. A generic feature is that the sleptons are relatively light. Because of this, these models frequently give a significant contribution to the anomalous magnetic moment of the muon, and neutralino-slepton coannihilation can play an important role in obtaining an acceptable dark matter relic density. Furthermore, the light sleptons give rise to a large multiplicity of lepton events at colliders, including a potentially suggestive clean trilepton signal at the Tevatron, and a substantial four lepton signature at the LHC.

show abstract

Section: Modelsmentioning

confidence: 99%

“…These models are attractive because the gravitino mass, and therefore the scale of supersymmetry breaking, is determined dynamically. The basic assumption underlying no-scale constructions is that the effective superspace Kähler density and superpotential have the form [24,25,26,27] …”

Section: Modelsmentioning

confidence: 99%

Higgs boson exempt no-scale supersymmetry and its collider and cosmology implications

2007

View full text Add to dashboard Cite

show abstract

“…The gaugino and Higgs fields hence acquire soft SUSYbreaking masses at tree level. Squarks and sleptons, on the other hand, are confined to some other branes, without direct coupling to S and this yields no-scale boundary conditions [23,24] for their masses. We therefore have the following boundary conditions at the compactification scale M C [22]:…”

Section: The Modelmentioning

confidence: 99%

Collider signatures of gravitino dark matter with a sneutrino NLSP

Covi

Kraml

2007

J. High Energy Phys.

View full text Add to dashboard Cite

For gravitino dark matter with conserved R-parity and mass in the GeV range, very strong constraints from Big Bang Nucleosynthesis exclude the popular NLSP candidates like neutralino and charged sleptons. In this letter we therefore draw attention to the case of a sneutrino NLSP, that is naturally realised in the context of gaugino mediation. We find interesting collider signatures, characterised by soft jets or leptons due to the small sneutrino-stau mass splitting. Moreover, the lightest neutralino can have visible decays into staus, and in some part of the parameter space also into selectrons and smuons. We also show the importance of coannihilation effects for the evaluation of the BBN constraints.

show abstract

“…Nevertheless, in contrast to what is usually advocated in AMSB [9], it has been argued [20] that only gaugino masses are generated by Weyl anomalies. In inoAMSB [8] [21], the scalar masses are then generated by renormalization group (RG) running as in what is often called gaugino mediation [22] or simple no-scale SUSY breaking models [23]. The inoAMSB model then avoids both the generic FCNC problems of gravity mediated scenarios and also the tachyonic slepton problem of the traditional AMSB construct.…”

Section: The Gaugino Amsb Modelmentioning

confidence: 99%

Testing the gaugino AMSB model at the Tevatron via slepton pair production

Baer

Alwis

Givens

et al. 2011

J. High Energ. Phys.

View full text Add to dashboard Cite

Gaugino AMSB models-wherein scalar and trilinear soft SUSY breaking terms are suppressed at the GUT scale while gaugino masses adopt the AMSB form-yield a characteristic SUSY particle mass spectrum with light sleptons along with a nearly degenerate wino-like lightest neutralino and quasi-stable chargino. The left-sleptons and sneutrinos can be pair produced at sufficiently high rates to yield observable signals at the Fermilab Tevatron. We calculate the rate for isolated single and dilepton plus missing energy signals, along with the presence of one or two highly ionizing chargino tracks. We find that Tevatron experiments should be able to probe gravitino masses into the ∼ 55 TeV range for inoAMSB models, which corresponds to a reach in gluino mass of over 1100 GeV.

show abstract

No-scale supersymmetric GUTs

Cited by 531 publications

References 28 publications

Higgs boson exempt no-scale supersymmetry and its collider and cosmology implications

Higgs boson exempt no-scale supersymmetry and its collider and cosmology implications

Collider signatures of gravitino dark matter with a sneutrino NLSP

Testing the gaugino AMSB model at the Tevatron via slepton pair production

Contact Info

Product

Resources

About