Perturbative $$\lambda $$ λ -supersymmetry and small $$\kappa $$ κ -phenomenology

Zheng, Sibo

doi:10.1140/epjc/s10052-015-3416-7

Cited by 4 publications

(5 citation statements)

References 40 publications

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“…Perturbative bounds: All points must satisfy λ 2 + κ 2 < ∼ (0.7) 2 [66]. This values ensures that the NMSSM or the minimal λ-SUSY model spaces remain perturbative up to the GUTscale (without invoking any new fields in between the weak-scale and the GUT-scale).…”

Section: The Nmssm Parameter Spacesmentioning

confidence: 99%

Production of a light top-squark pair in association with a light non-SM Higgs boson within the NMSSM from proton–proton collisions at s = 13 TeV and 33 TeV

Das

Fraga

Ávila

2019

Int. J. Mod. Phys. A

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We study the potential of the LHC accelerator, and a future 33 TeV proton collider, to observe the production of a light top squark pair in association with the lightest Higgs boson (t 1t1 h 1 ), as predicted by the Next-to-Minimal Supersymmetric Standard Model (NMSSM). We scan randomly about ten million points of the NMSSM parameter space, allowing all possible decays of the lightest top squark and lightest Higgs boson, with no assumptions about their decay rates, except for known physical constraints such as perturbative bounds, Dark matter relic density consistent with recent Planck experiment measurements, Higgs mass bounds on the next to lightest Higgs boson, h 2 , assuming it is consistent with LHC measurements for the Standard Model Higgs boson, LEP bounds for the chargino mass and Z invisible width, experimental bounds on B meson rare decays and some LHC experimental bounds on SUSY particle spectra different to the particles involved in our study. We find that for low mass top-squark, the dominating decay mode ist 1 → bχ ± 1 withχ ± 1 → Wχ 0 1 . We use three bench mark points with the highest cross sections, which naturally fall within the compressed spectra of the top squark, and make a phenomenological analysis to determine the optimal event selection that maximizes the signal significance over backgrounds. We focus on the leptonic decays of both W 's and the decay of lightest Higgs boson into b-quarks (h 1 → bb). Our results show that the high luminosity LHC will have limitations to observe the studied signal and only a proton collider with higher energy will be able to observe the SUSY scenario studied with more than three standard deviations over background. * symmetry breaking mechanism in the SM and opens up the second part, which is mandatory to establish the exact nature of the symmetry breaking mechanism and, eventually, identify the possible effects of Supersymmetry (SUSY). The available SUSY models at our disposal are many: minimal Supergravity (mSUGRA), Minimal Supersymmetric Standard Model (MSSM) [3], Next-to-MSSM (NMSSM) [4,5,6,7,8], etc. In our analysis we consider NMSSM model which solved the µ-problem of the MSSM. It is to be noted that the earlier development for the origin of the µ-term in Supertpoetial studied from Supergravity approach [9] and from the non-renormalization operators [10].The appealing of SUSY over the SM leads to an enlarged particle spectrum. As none of the SUSY particles has been discovered by any high energy collider experiment yet, SUSY must be broken. Various scenarios of the breaking mechanism have been developed in the past few decades. The top quark, the heaviest particle among the SM quark sector, having a large Yukawa coupling, has a superpartner called the top-squark, which is expected to be the lightest among all the sparticles in the enlarged squark sector, except for the gaugino sectors, like neutralinos and charginos. The light top-squark is theoretically favored from the stabilization of the Higgs potential, as well as from the longitudinal scattering ...

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Section: The Nmssm Parameter Spacesmentioning

confidence: 99%

Production of a light top-squark pair in association with a light non-SM Higgs boson within the NMSSM from proton–proton collisions at s = 13 TeV and 33 TeV

Das

Fraga

Ávila

2019

Int. J. Mod. Phys. A

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“…• Perturbative bounds: in order to ensure that the NMSSM is perturbative up to a Grand Unified Theory (GUT) scale, it is necessary to impose that all the points satisfy λ 2 + κ 2 0.7 [31].…”

Section: The Nmssmmentioning

confidence: 99%

Prospects for discovering a light charged Higgs boson within the NMSSM at the FCC-eh collider

Das¹,

Hernández-Sanchez²,

Moretti³

et al. 2018

Preprint

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We analyze the prospects of observing relatively light charged Higgs bosons (h ± ) in their decays via h − → sc + sū at the upcoming Future Circular Collider in hadron-electron mode (FCC-eh) with √ s ≈ 3.5 TeV. Assuming that the intermediate Higgs boson (h2) is Standard Model (SM)-like, we study the production of e − b → νeh − b (also b could be b in both initial and final states) in the framework of the Next-to-Minimal Supersymmetric Standard Model (NMSSM). We consider constraints from Dark Matter (DM), super-particle and the Higgs boson data. The charged Higgs boson decays into light flavors leads to a three-jets with missing transverse energy signal with one b-tagged jet. Our results show that light charged Higgs bosons with mass close to, e.g., 114(121) GeV have the maximal significance of 3.2(1.8)σ, upon using normal cut based selections and after 1 ab −1 of luminosity. However, we further adopt an optimization technique to enhance the latter to 4.4 (2.2)σ, respectively.

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“…Perturbative bounds: We first imposed, λ 2 +κ 2 < ∼ (0.7) 2 [52] and if not satisfied we discard the parameter space and generate the next random model space.…”

Section: The Nmssm Parameter Spacesmentioning

confidence: 99%

Light neutral CP -even Higgs boson within the next-to-minimal supersymmetric standard model at the Large Hadron Electron Collider

Das

Nowakowski

2017

Phys. Rev. D

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We analyze the prospects of observing the light CP-even neutral Higgs bosons (h 1 ) in their decays into bb quarks, in the neutral and charged current production processes eh 1 q and νh 1 q at the upcoming LHeC, with √ s ≈ 1.296 TeV. Assuming that the intermediateis Standard Model (SM)-like, we study the Higgs production within the framework of NMSSM. We consider the constraints from Dark-matter, Sparticle masses, and the Higgs boson data. The signal in our analysis can be classified as three jets, with electron (missing energy)coming from the neutral (charged) current interaction. We demand that the number of b-tagged jets in the central rapidity region be greater or equal to two. The remaining jet is tagged in the forward regions. With this forward jet and two b-tagged jets in the central region, we reconstructed three jets invariant masses. Applying some lower limits on these invariant masses turns out to be an essential criterion to enhance the signal-to-background rates, with slightly different sets of kinematical selections in the two different channels. We consider almost all reducible and irreducible SM background processes. We find that the non-SM like Higgs boson, h 1 , would be accessible in some of the NMSSM benchmark points, at approximately 0.4σ (2.5σ) level in the e+3j channel up to Higgs boson masses of 75 GeV and in the E / T +3j channel could be discovered with 1.7σ (2.4σ) level up to Higgs boson masses of 88 GeV with 100 fb −1 of data in a simple cut-based (with optimization) selection. With ten times more data accumulation at the end of the LHeC run and using optimization, one can have 5σ discovery in the electron (missing energy) channel up to 85 (more than 90) GeV.

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Perturbative $$\lambda $$ λ -supersymmetry and small $$\kappa $$ κ -phenomenology

Cited by 4 publications

References 40 publications

Production of a light top-squark pair in association with a light non-SM Higgs boson within the NMSSM from proton–proton collisions at s = 13 TeV and 33 TeV

Production of a light top-squark pair in association with a light non-SM Higgs boson within the NMSSM from proton–proton collisions at s = 13 TeV and 33 TeV

Prospects for discovering a light charged Higgs boson within the NMSSM at the FCC-eh collider

Light neutral CP -even Higgs boson within the next-to-minimal supersymmetric standard model at the Large Hadron Electron Collider

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