Signals for the minimal gauge-mediated supersymmetry-breaking model at the Fermilab Tevatron collider

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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“…Using Isatools [42,43] and [44], we also require the following bounds from heavy flavor (B-physics) to be respected: [46].…”

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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“…Unfortunately, this final state will probably suffer from considerable backgrounds † . Recall also that in this scenario all SUSY processes give rise to two hard photons and missing p T [2,10]. They can therefore also contribute to the background if one of the photons is lost.…”

Section: Collider Signalsmentioning

confidence: 99%

“…The probability for such an event to come from Standard Model (SM) processes is about 10 −3 , but it can quite easily be explained [8,2] in models with a light gravitino. It should be admitted that the absence of additional events with two hard photons and missing transverse momentum [9] is beginning to cast some doubt [10] on this explanation. Nevertheless models with a very light gravitino remain an interesting field of study in their own right [1].…”

Section: Introductionmentioning

confidence: 99%

Higgs boson decays into light gravitinos

Djouadi

Drees

1997

Physics Letters B

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We study decays of the neutral and charged Higgs bosons of the minimal supersymmetric standard model into a very light gravitino and a neutralino or chargino. Present experimental constraints already imply that the lighter scalar Higgs boson can only have a very small branching ratio into this mode. However, if the gravitino mass is below ∼ 0.5 eV, the heavier neutral and charged Higgs boson decays into a gravitino can be important or even dominant. We discuss the resulting signature for associate production of the heavy CP-even and the CP-odd states at future e + e − colliders, and comment on Higgs boson production at hadron colliders.

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“…Moreover, we use the IsaTools package [34,35] and Ref. [36] to implement the following B-physics constraints…”

Section: Phenomenological Constraints and Scanning Proceduresmentioning

confidence: 99%

Electroweak supersymmetry from the generalized minimal supergravity model in the MSSM

Raza

2015

Phys. Rev. D

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Considering the Generalized Minimal Supergravity Model (GmSUGRA) in the Minimal Supersymmetric Standard Model (MSSM), we study the Electroweak Supersymmetry (EW-SUSY), where the squarks and/or gluino are heavy around a few TeVs while the sleptons, sneutrinos, bino, winos, and/or higgsinos are light within one TeV. We resolves the (g − 2) µ /2 discrepancy for the muon anomalous magnetic moment in the Standard Model (SM) successfully and identifies a parameter space where such solutions also have the electroweak finetuning measures ∆ EW 16.5 (6%) and ∆ EW 25 (4%) without and with the Wilkinson Microwave Anisotropy Probe (WMAP) bounds, respectively. We find that the allowed mass ranges, which are consistent within 3σ of the g − 2 discrepancy, for the lightest neutralino, charginos, stau, stau neutrinos, and firse two families of sleptons are [44, 390] GeV, [100, 700] GeV, [100, 700], [52, 800] and [150, 800] GeV, respectively. Moreover, our solutions satisfy the latest bounds reported by the ATLAS and CMS Collaborations on electroweakinos and sleptons. The colored sparticles such as light stop, gluinos, and the first two generations of squark masses have been found in the mass ranges of [500, 3000] GeV, [1300, 4300] GeV, and [1800, 4200] GeV, respectively. To obtain the observed dark matter relic density for the Lightest Supersymmetric Particle (LSP) neutralino, we have the bino-wino, LSP neutralino-stau, and LSP neutralinotau sneutrinos coannihilation scenarios, and the resonance solutions such as A-pole, Higgs-pole, and Z-pole. We identify the higgsino-like LSP neutralino and display its spin-independent and 1 E-mail:tli@itp.ac.cn 2 E-mail:shabbar@itp.ac.cn arXiv:1409.3930v3 [hep-ph] 23 Mar 2015 spin-dependent cross sections with nucleons. We present ten benchmark points which can be tested at the up coming collider searches as well.2

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Signals for the minimal gauge-mediated supersymmetry-breaking model at the Fermilab Tevatron collider

Cited by 103 publications

References 33 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

Higgs boson decays into light gravitinos

Electroweak supersymmetry from the generalized minimal supergravity model in the MSSM

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