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

Baer, Howard; Gogoladze, Ilia; Mustafayev, Azar; Raza, Shabbar; Shafi, Qaisar

doi:10.1007/jhep03(2012)047

Cited by 27 publications

(19 citation statements)

References 105 publications

(111 reference statements)

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“…We found in the b − τ case NLSP stop solution, with masses for the latter of order ∼ 600 − 900 GeV. Note that NLSP stop solutions were previously found in the study of b − τ YU in SUSY SU (5) in the mass range of ∼ 100 − 400 GeV with tan β 20 [32]. Our results are in agreement with the results previously reported in [45] and [46].…”

Section: Nlsp Gluino and Nlsp Stop From B-τ Yusupporting

confidence: 92%

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NLSP gluino and NLSP stop scenarios fromb−τYukawa unification

2015

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We present a study of b-τ Yukawa unified supersymmetric SU (4) c × SU (2) L × SU (2) R model (with µ > 0), which predicts the existence of gluino -neutralino and stop -neutralino coannihilation scenarios compatible with the desired relic LSP neutralino dark matter abundance and other collider constraints. The NLSP gluino or NLSP stop masses vary between 400 GeV to ∼ 1 TeV. The NLSP gluinos will be accessible at the 14 TeV LHC, while we hope that the NSLP stop solutions will be probed in future LHC searches. We also identify regions of the parameter space in which the gluino and the lighter stop are closely degenerate in mass, interchangeably playing the role of NLSP and NNLSP.We also update a previous study of t − b − τ Yukawa unification and show that NLSP gluino of mass ∼ 1 TeV, with a mass difference between the gluino and neutralino of less than 80 GeV, can be realized consistent with the current collider and astrophysical constraints. We present benchmark points for b−τ and t−b−τ Yukawa unification that can be accessible at the LHC.

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Section: Nlsp Gluino and Nlsp Stop From B-τ Yusupporting

confidence: 92%

“…As shown, for instance in Refs. [32,33], one can consider a Peccei-Quinn augmented MSSM with NLSP neutralino and non-thermally produced axino as LSP. The solutions in which the neutralino cannot saturate the dark matter are still viable in such a scenario.…”

Section: Scanning Procedures and Phenomenological Constraintsmentioning

confidence: 99%

NLSP gluino and NLSP stop scenarios fromb−τYukawa unification

2015

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“…In this case, the relic abundance of LSP should also be consistent with the current results from the WMAP [48] and Planck [49] satellites. However, even if a solution does not satisfy the dark matter observations, it can still survive in conjunction with other form(s) of the dark matter formation [50,51]. In this case, the lightest neutralino may not be related to the DM phenomenology.…”

Section: Scanning Procedures and Experimental Constraintsmentioning

confidence: 99%

Light stops and fine-tuning in MSSM

2018

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We discuss the fine-tuning issue within the MSSM framework. Following the idea that the fine-tuning can measure effects of some missing mechanism, we impose non-universal gaugino masses at the GUT scale, and explore the low scale implications. We realize that the fine-tuning parametrized with EW can be as low as zero. We consider the stop mass with a special importance and focus on the mass scales as mt ≤ 700 GeV, which are excluded by the current experiments when the stop decays into a neutralino along with a top quark or a chargino along with a bottom quark. We find that the stop mass can be as low as about 250 GeV with EW ∼ 50. We find that the solutions in this region can be exluded only up to 60% when stop decays into a neutralino-top quark, and 50% when it decays into a chargino-b quark. Setting 65% CL to be potential exclusion and 95% to be pure exclusion limit such solutions will be tested in near future experiments, which are conducted with higher luminosity. In addition to stop, the region with low fine-tuning and light stops predicts masses for the other supersymmetric particles such as mb 700 GeV, mτ 1 TeV, mχ± 1 120 GeV. The details for the mass scales and decay rates are also provided by tables of benchmark points.

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“…The region formed by the isolated brown points in figure 7 corresponds to the case of small tan β. As pointed out in [65][66][67], b-τ Yukawa unification for small tanβ values requires that the sfermion SSB mass terms are larger than 5 TeV or so. Moreover, the non-universal SSB sfermion mass term terms at M GUT are need to be based on their SU(5) representation.…”

Section: So(10) Gut With Universal Gauginos Massesmentioning

confidence: 96%

Top quark and Higgs boson masses in supersymmetric models

Gogoladze

Khalid

Raza

et al. 2014

J. High Energ. Phys.

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We study the implications for bounds on the top quark pole mass m t in models with low scale supersymmetry following the discovery of the Standard Model-like Higgs boson. In the minimal supersymmetric standard model, we find that m t ≥ 164 GeV, if the light CP even Higgs boson mass m h = 125 ± 2 GeV. We also explore the top quark and Higgs boson masses in two classes of supersymmetric SO(10) models with t-b-τ Yukawa coupling unification at M GUT . In particular, assuming SO(10) compatible non-universal gaugino masses, setting m h = 125 GeV and requiring 5% or better Yukawa unification, we obtain the result 172 GeV ≤ m t ≤ 175 GeV. Conversely, demanding 5% or better t-b-τ Yukawa unification and setting m t = 173.2 GeV, the Higgs boson mass is predicted to lie in the range 122 GeV ≤ m h ≤ 126 GeV.

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

Cited by 27 publications

References 105 publications

NLSP gluino and NLSP stop scenarios fromb−τYukawa unification

NLSP gluino and NLSP stop scenarios fromb−τYukawa unification

Light stops and fine-tuning in MSSM

Top quark and Higgs boson masses in supersymmetric models

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