Constraining the MSSM with universal gaugino masses and implication for searches at the LHC

Bélanger, G.; Boudjema, F.; Pukhov, A.; Singh, Ritesh K.

doi:10.1088/1126-6708/2009/11/026

Cited by 79 publications

(70 citation statements)

References 55 publications

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“…In scanning the parameter space, we employ the Metropolis-Hastings algorithm as described in [33]. The data points collected all satisfy the requirement of REWSB, with the neutralino being the LSP.…”

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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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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“…We employ the Metropolis-Hasting algorithm as described in Ref. [42] and require all points to satisfy REWSB. The REWSB requirement is a crucial theoretical constraint on the parameter space [43].…”

Section: Scanning Procedures and Experimental Constraintsmentioning

confidence: 99%

Stop on top: SUSY parameter regions and fine-tuning constraints

Demir¹,

Ün

2014

Phys. Rev. D

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We analyze minimal supersymmetric models in order to determine in what parameter regions with what amount of fine-tuning they are capable of accommodating the LHC-allowed top-stop degeneracy window. The stops must be light enough to enable Higgs naturalness yet heavy enough to induce a 125 GeV Higgs boson mass. These two constraints imply a large mass splitting. By an elaborate scan of the parameter space, we show that the stop-on-top scenario requires at least Δ CMSSM ≃ Oð10 4 Þ fine-tuning in the constrained minimal supersymmetric Standard Model (CMSSM). By relaxing the CMSSM parameter space with nonuniversal Higgs masses, we find that Δ NUHM1 ≃ Oð10 4 Þ. The CMSSM with a gravitino lightest supersymmetric particle works slightly better than the nonuniversal Higgs mass model. Compared to all these, the CMSSM with μ < 0 and nonuniversal gauginos yields a much smaller fine-tuning Δ μ;g ≃ Oð100Þ. Our results show that the gaugino sector can pave the road toward a more natural stop-ontop scenario.

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“…In scanning the parameter space, we employ the Metropolis-Hastings algorithm as described in [35]. The data points collected all satisfy the requirement of radiative electroweak symmetry breaking (REWSB), with the neutralino being the LSP in each case.…”

Section: Scanning Procedure Parameter Space and Experimental Constramentioning

confidence: 99%

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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Constraining the MSSM with universal gaugino masses and implication for searches at the LHC

Cited by 79 publications

References 55 publications

Electroweak supersymmetry from the generalized minimal supergravity model in the MSSM

Electroweak supersymmetry from the generalized minimal supergravity model in the MSSM

Stop on top: SUSY parameter regions and fine-tuning constraints

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

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