Soft probes of SU(5) unification

Gogoladze, Ilia; Khalid, Rizwan; Okada, Nobuchika; Shafi, Qaisar

doi:10.1103/physrevd.79.095022

Cited by 51 publications

(99 citation statements)

References 44 publications

(23 reference statements)

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“…An important conclusion reached in Ref. [25] is that with the same sign but non-universal soft gaugino masses, Yukawa unification in 4-2-2 for µ > 0 is compatible with neutralino dark matter, with gluino co-annihilation [25,28] playing an important role.…”

Section: Introductionmentioning

confidence: 99%

Sparticle mass spectra from SU(5) SUSY GUT models with b − τ Yukawa coupling unification

Baer

Gogoladze

Mustafayev

et al. 2012

J. High Energ. Phys.

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Supersymmetric grand unified models based on the gauge group SU (5) often require in addition to gauge coupling unification, the unification of b-quark and τ -lepton Yukawa couplings.We examine SU (5) SUSY GUT parameter space under the condition of b − τ Yukawa coupling unification using 2-loop MSSM RGEs including full 1-loop threshold effects. The Yukawa-unified solutions break down into two classes. Solutions with low tan β ∼ 3 − 11 are characterized by mg ∼ 1 − 4 TeV and mq ∼ 1 − 5 TeV. Many of these solutions would be beyond LHC reach, although they contain a light Higgs scalar with m h < 123 GeV and so may be excluded should the LHC Higgs hint persist. The second class of solutions occurs at large tan β ∼ 35 − 60, and are a subset of t − b − τ unified solutions. Constraining only b − τ unification to ∼ 5% favors a rather light gluino with mg ∼ 0.5−2 TeV, which should ultimately be accessible to LHC searches. While our b − τ unified solutions can be consistent with a picture of neutralino-only cold dark matter, invoking additional moduli or Peccei-Quinn superfields can allow for all of our Yukawa-unified solutions to be consistent with the measured dark matter abundance.

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Section: Introductionmentioning

confidence: 99%

Sparticle mass spectra from SU(5) SUSY GUT models with b − τ Yukawa coupling unification

Baer

Gogoladze

Mustafayev

et al. 2012

J. High Energ. Phys.

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“…Both ratios can emerge from renormalizable GUT operators for Yukawa couplings in the context of SU(5) GUTs or PatiSalam models [seen as a step towards SO(10) GUTs]. The phenomenology of these relations was studied quite extensively; for some recent references, see, for instance, [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

GUT predictions for quark-lepton Yukawa coupling ratios with messenger masses from non-singlets

Antusch

King²,

Spinrath³

2014

Phys. Rev. D

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We propose new predictions from grand unified theories (GUTs) [applicable to both supersymmetric (SUSY) and non-SUSY models] for the ratios of quark and lepton Yukawa couplings. These new predictions arise from splitting the masses of the messenger fields for the GUT-scale Yukawa operators by Clebsch-Gordan factors from GUT symmetry breaking. This has the effect that these factors enter inversely in the predicted quark-lepton Yukawa coupling ratios, leading to new possible GUT predictions. We systematically construct the new predictions that can be realized in this way in SU(5) GUTs and Pati-Salam unified theories and discuss model building applications.

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“…Typical sparticle mass spectrum, once observed, can be a probe of SU(5) unification [3]. In a similar way, three different types of seesaw mechanism for neutrino masses can be distinguished at the LHC and the ILC [4].…”

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confidence: 92%

Discrimination of supersymmetric grand unified models in gaugino mediation

Okada

Tran

2011

Phys. Rev. D

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We consider supersymmetric grand unified theory (GUT) with the gaugino mediated supersymmetry breaking and investigate a possibility to discriminate different GUT models in terms of predicted sparticle mass spectra. Taking two example GUT models, the minimal SU(5) and a simple SO(10) models, and imposing a variety of theoretical and experimental constraints, we calculate sparticle masses. Fixing parameters of each model so as to result in the same mass of neutralino as the lightest supersymmetric particle (LSP), giving the observed dark matter relic density, we find sizable mass differences in the left-handed slepton and right-handed down-type squark sectors in two models, which can be a probe to discriminate the GUT models realized at the GUT scale far beyond the reach of collider experiments.

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Soft probes of SU(5) unification

Cited by 51 publications

References 44 publications

Sparticle mass spectra from SU(5) SUSY GUT models with b − τ Yukawa coupling unification

Sparticle mass spectra from SU(5) SUSY GUT models with b − τ Yukawa coupling unification

GUT predictions for quark-lepton Yukawa coupling ratios with messenger masses from non-singlets

Discrimination of supersymmetric grand unified models in gaugino mediation

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