Probing the hyperbolic branch/focus point region of the constrained minimal supersymmetric standard model with generalized Yukawa quasiunification

Karagiannakis, N.; Lazarides, George; Pallis, C.

doi:10.1103/physrevd.92.085018

Cited by 5 publications

(3 citation statements)

References 104 publications

(129 reference statements)

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“…[104] in the A/H funnel and χ ± 1 − χ coannihilation regions -see also Ref. [116]. These m 3/2 's though are more easily reconciled with low energy data in less restrictive versions of MSSM -see e.g.…”

Section: Resultsmentioning

confidence: 60%

Induced-gravity GUT-scale Higgs inflation in supergravity

Pallis

Shafi

2018

Eur. Phys. J. C

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Models of induced-gravity inflation are formulated within Supergravity employing as inflaton the Higgs field which leads to a spontaneous breaking of a U (1) B−L symmetry at M GUT = 2 • 10 16 GeV. We use a renormalizable superpotential, fixed by a U (1) R symmetry, and Kähler potentials which exhibit a quadratic non-minimal coupling to gravity with or without an independent kinetic mixing in the inflaton sector. In both cases we find inflationary solutions of Starobinsky type whereas in the latter case, others (more marginal) which resemble those of linear inflation arise too. In all cases the inflaton mass is predicted to be of the order of 10 13 GeV. Extending the superpotential of the model with suitable terms, we show how the MSSM μ parameter can be generated. Also, non-thermal leptogenesis can be successfully realized, provided that the gravitino is heavier than about 10 TeV.

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Section: Resultsmentioning

confidence: 60%

Induced-gravity GUT-scale Higgs inflation in supergravity

Pallis

Shafi

2018

Eur. Phys. J. C

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“…Indeed the MSSM is one of the best-studied extensions to the SM to date. The latest literature covers topics ranging from global fits to the MSSM with different choices for the number of dimensions in the electroweak scale parameterisation [101][102][103][104][105][106][107], to studies of various aspects of its more constrained versions defined at a high scale [108][109][110][111][112][113][114][115][116][117][118]. Theoretical considerations, such as naturalness [119][120][121][122][123][124][125][126][127][128][129][130], and gauge unification within the MSSM [131][132][133][134][135], have also been a concern.…”

Section: Introductionmentioning

confidence: 99%

A global fit of the MSSM with GAMBIT

Athron¹,

Balázs²,

Bringmann³

et al. 2017

Eur. Phys. J. C

123

160

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We study the seven-dimensional Minimal Supersymmetric Standard Model (MSSM7) with the new GAM-BIT software framework, with all parameters defined at the weak scale. Our analysis significantly extends previous weak-scale, phenomenological MSSM fits, by adding more and newer experimental analyses, improving the accuracy and detail of theoretical predictions, including dominant uncertainties from the Standard Model, the Galactic dark matter halo and the quark content of the nucleon, and employing novel and highly-efficient statistical sampling methods to scan the parameter space. We find regions of the MSSM7 a

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“…( 6) refers to the QYU condition. Note that C can be either positive or negative, but it is possible to restrict it to positive values without lose of generality by adjusting the phase of the representations H and h. QYU yield significantly different low scale phenomenology [18] than the exact YU. In addition, QYU can provide an interesting scenario in respect of the fine-tuning, since a better fine-tuning prefers that the ratios of Yukawa couplings are different from unity [19], when the universal boundary conditions are imposed at M GUT .…”

Section: Introductionmentioning

confidence: 99%

Quasi Yukawa Unification and Fine-Tuning in U(1) Extended SSM

Hicyilmaz,

Ceylan,

Altas

et al. 2016

Preprint

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We consider the low scale implications in the U (1) extended MSSM (UMSSM). We restrict the parameter space such that the lightest supersymmetric particle (LSP) is always the lightest neutralino. In addition, we impose quasi Yukawa unification (QYU) at the grand unification scale (M GUT ). QYU strictly requires the ratios among the yukawa couplings as y t /y b ∼ 1.2, y τ /y b ∼ 1.4, and y t /y τ ∼ 0.8. We find that the need of fine-tuning over the fundamental parameter space of QYU is in the acceptable range (∆ EW ≤ 10 3 ), even if the universal boundary conditions are imposed at M GUT , in contrast to CMSSM and NUHM. UMSSM with the universal boundary conditions yields heavy stops (m t 2.5 TeV), gluinos (m g 2 TeV), and squarks from the first two families (m q 4 TeV). Similarly the stau mass is bounded from below at about 1.5 TeV. Despite this heavy spectrum, we find ∆ EW 300, which is much lower than that needed for the minimal supersymmetric models. In addition, UMSSM yield relatively small µ−term, and the LSP neutralio is mostly form by the Higgsinos of mass 700 GeV. We obtain also bino-like dark matter (DM) of mass about 400 GeV. Wino is usually found to be heavier than Higgsinos and binos, but there is a small region where µ ∼ M 1 ∼ M 2 ∼ 1 TeV. We also identify charginoneutralino coannihilation channel and A−resonance solutions which reduce the relic abundance of LSP neutralino down to the ranges compatible with the current WMAP measurements.

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Probing the hyperbolic branch/focus point region of the constrained minimal supersymmetric standard model with generalized Yukawa quasiunification

Cited by 5 publications

References 104 publications

Induced-gravity GUT-scale Higgs inflation in supergravity

Induced-gravity GUT-scale Higgs inflation in supergravity

A global fit of the MSSM with GAMBIT

Quasi Yukawa Unification and Fine-Tuning in U(1) Extended SSM

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