Flavor symmetry based MSSM: Theoretical models and phenomenological analysis

Babu, K. S.; Gogoladze, Ilia; Raza, Shabbar; Shafi, Qaisar

doi:10.1103/physrevd.90.056001

Cited by 14 publications

(38 citation statements)

References 125 publications

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“…Thus, it is hard to simultaneously explain the observed Higgs boson mass and resolve the muon g − 2 anomaly if we consider CMSSM, NUHM1 or NUHM2, since in all these cases, the slepton masses are larger than 1 TeV. Recently, there have been several attempts to reconcile this apparent tension between muon g − 2 and the Higgs boson mass within the MSSM framework by assuming non-universal SSB mass terms for the gauginos [13,14] or the sfermions [15,16] at the GUT scale. Indeed, a simultaneous explanation of m h and muon g − 2 is possible [17] in the presence of t − b − τ Yukawa coupling unification condition [18].…”

Section: Introductionmentioning

confidence: 99%

GUT-inspired supersymmetric model forh→γγand the muong−2

Ajaib¹,

Gogoladze²,

Shafi³

2015

Phys. Rev. D

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We study a GUT-inspired supersymmetric model with non-universal gaugino masses that can explain the observed muon g − 2 anomaly while simultaneously accommodating an enhancement or suppression in the h → γγ decay channel. In order to accommodate these observations and m h 125 − 126 GeV, the model requires a spectrum consisting of relatively light sleptons whereas the colored sparticles are heavy. The predicted stau mass range corresponding to R γγ ≥ 1.1 is 100 GeV mτ 200 GeV. The constraint on the slepton masses, particularly on the smuons, arising from considerations of muon g − 2 is somewhat milder. The slepton masses in this case are predicted to lie in the few hundred GeV range. The colored sparticles turn out to be considerably heavier with mg 4.5 TeV and mt 1 3.5 TeV, which makes it challenging for these to be observed at the 14 TeV LHC.

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Section: Introductionmentioning

confidence: 99%

GUT-inspired supersymmetric model forh→γγand the muong−2

Ajaib¹,

Gogoladze²,

Shafi³

2015

Phys. Rev. D

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“…In this Section we provide a brief description of the sMSSM setup and its motivations [17]. We also describe at the end of this section a complete model based on SU (2) flavor symmetry that leads to sMSSM phenomenology at energies below the GUT scale.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper we develop further the framework of flavor symmetry-based minimal supersymmetric standard model, sMSSM, suggested recently [17]. It will be shown that in this framework, which consists of seven phenomenological parameters that describe supersymmetry breaking, it is possible to explain the muon g − 2 anomaly and the Higgs boson mass simultaneously, along with the observed dark matter abundance.…”

Section: Introductionmentioning

confidence: 99%

“…We refer the reader to Ref. [17] for a more detailed discussion including additional models that generate the sMSSM spectrum. In supergravity models, it is generally assumed that supersymmetry breaks dynamically in a hidden sector, which is communicated to the visible sector via gravity.…”

Section: Introductionmentioning

confidence: 99%

“…The flavor symmetry-based minimal supersymmetric standard model (sMSSM) suggested in Ref. [17] is a framework for controlled SUSY breaking based on symmetry principles. As the framework is based on gauge symmetries, the Lagrangian is guaranteed to be protected against quantum gravitational corrections.…”

Section: Introductionmentioning

confidence: 99%

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Muong−2, 125 GeV Higgs boson, and neutralino dark matter in a flavor symmetry-based MSSM

et al. 2014

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We discuss the sparticle (and Higgs) spectrum in a class of flavor symmetry-based minimal supersymmetric standard models, referred to here as sMSSM. In this framework the SUSY breaking Lagrangian takes the most general form consistent with a grand unified symmetry such as SO(10) and a non-Abelian flavor symmetry acting on the three families with either a 2+1 or a 3 family assignment. Models based on gauged SU (2) and SO(3) flavor symmetry, as well as non-Abelian discrete symmetries such as S 3 and A 4 , have been suggested which fall into this category. These models describe supersymmetry breaking in terms of seven phenomenological parameters. The soft supersymmetry breaking masses at M GUT of all sfermions of the first two families are equal in sMSSM, which differ in general from the corresponding third family mass. In such a framework we show that the muon g − 2 anomaly, the observed Higgs boson mass of ∼ 125 GeV, and the observed relic neutralino dark matter abundance can be simultaneously accommodated. The resolution of the muon g − 2 anomaly in particular yields the result that the first two generation squark masses, as well the gluino mass, should be 2 TeV, which will be tested at LHC14.

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Supersymmetry after the Higgs

Nath

2015

Annalen der Physik

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A brief review is given of the implications of a 126 GeV Higgs boson for the discovery of supersymmetry. Thus a 126 GeV Higgs boson is problematic within the Standard Model because of vacuum instability pointing to new physics beyond the Standard Model. The problem of vacuum stability is overcome in the SUGRA GUT model but the 126 GeV Higgs mass implies that the average SUSY scale lies in the several TeV region. The largeness of the SUSY scale relieves the tension on SUGRA models since it helps suppress flavor changing neutral currents and CP violating effects and also helps in extending the proton life time arising from baryon and lepton number violating dimension five operators. The geometry of radiative breaking of the electroweak symmetry and fine tuning in view of the large SUSY scale are analyzed.Consistency with the Brookhaven g μ − 2 result is discussed. It is also shown that a large SUSY scale implied by the 126 GeV Higgs boson mass allows for light gauginos (gluino, charginos, neutralinos) and sleptons. These along with the lighter third generation squarks are the prime candidates for discovery at RUN II of the LHC. Implication of the 126 GeV Higgs boson for the direct search for dark matter is discussed. Also discussed are the sparticles mass hierarchies and their relationship with the simplified models under the Higgs boson mass constraint.In 2012 the Large Hadron Collider (LHC) made a landmark discovery of a new boson. Thus the CMS and AT-LAS collaborations discovered a boson with a mass of ∼126 GeV [1][2][3][4]. It is now confirmed that this newly discovered particle is the long sought after Higgs boson [5][6][7][8] which plays a central role in the breaking of the electroweak symmetry. While the observed particle is the last missing piece of the Standard Model there are strong indications that at the same time its discovery portends discovery of a new realm of physics specifically supersymmetry. Below we elaborate on this theme in further detail.The outline of the rest of the paper is as follows: In Section 1 we discuss the status of the Higgs boson in the Standard Model, the issue of vacuum instability and the need for new physics beyond the Standard Model. In Section 2 we consider the implications of a 126 GeV Higgs boson within the framework of supersymmetry and specifically in the framework of supergravity unified models. As is well known a 126 GeV Higgs boson within supersymmetry leads to a high SUSY scale M s with M s lying in the TeV region. On the other hand the Brookhaven g μ − 2 experiment [9] shows a 3σ deviation from the Standard Model prediction [10,11]. An effect of this size requires that the average scale of sparticle masses entering the loops in the supersymmetric electroweak correction to g μ − 2 be low, i..e, O(100) GeV. Assuming the 3σ effect is robust we discuss in Section 3 how to reconcile the high SUSY scale that is indicated by the 126 GeV Higgs boson mass with the low SUSY scale indicated by the Brookhaven experiment. In Section 4 we discuss the implications of the Higgs ...

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Flavor symmetry based MSSM: Theoretical models and phenomenological analysis

Cited by 14 publications

References 125 publications

GUT-inspired supersymmetric model forh→γγand the muong−2

GUT-inspired supersymmetric model forh→γγand the muong−2

Muong−2, 125 GeV Higgs boson, and neutralino dark matter in a flavor symmetry-based MSSM

Supersymmetry after the Higgs

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