Stop on Top: SUSY Parameter Regions, Fine-Tuning Constraints

Abstract

We analyze minimal supersymmetric models in order to determine in what parameter regions with what amount of fine-tuning they are capable of accomodating 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 stop-on-top scenario requires at least Delta_CMSSM ~ O(10^4) fine-tuning in the CMSSM. By relaxing the CMSSM parameter space with nonuniversal Higgs masses, we find that Delta_NUHM1 ~ O(10^4). The CMSSM with gravitino LSP works slightly better than the NUHM1 model. Compared to all these, the CMSSM with mu<0 and nonuniversal gauginos yield a much smaller fine-tuning Delta_{mu,g} ~ O(100). Our results show that gaugino sector can pave the road towards a more natural stop-on-top scenario.

arXiv comment30 pages, 12 figures

References in corpus (93)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Theories with Gauge-Mediated Supersymmetry Breaking
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Higgs mass and vacuum stability in the Standard Model at NNLO
• FeynHiggs: a program for the calculation of the masses of the neutral CP-even Higgs bosons in the MSSM
• Investigating the near-criticality of the Higgs boson
• SPheno, a program for calculating supersymmetric spectra, SUSY particle decays and SUSY particle production at e+ e- colliders
• Precision Corrections in the Minimal Supersymmetric Standard Model
• DarkSUSY: Computing Supersymmetric Dark Matter Properties Numerically
• SOFTSUSY: a program for calculating supersymmetric spectra
• micrOMEGAs3.1 : a program for calculating dark matter observables
• Observation of a new boson with mass near 125 GeV in pp collisions at sqrt(s) = 7 and 8 TeV
• micrOMEGAs: A program for calculating the relic density in the MSSM
• Higgs boson mass and new physics
• Natural SUSY Endures
• A Natural SUSY Higgs Near 125 GeV
• Big-Bang Nucleosynthesis and Gravitino
• Higgs-Mediated $B^0->{\mu }^{+}{\mu }^{-}$ in Minimal Supersymmetry
• A 125 GeV SM-like Higgs in the MSSM and the $\gamma \gamma$ rate
• First evidence for the decay Bs -> mu+ mu-
• Nucleon Decay in the Minimal Supersymmetric $SU(5)$ Grand Unification
• Radiative natural SUSY with a 125 GeV Higgs boson
• SUSY, the Third Generation and the LHC
• Supersymmetry, Naturalness, and Signatures at the LHC
• Supergravity with a Gravitino LSP
• Sparticle Spectroscopy and Electroweak Symmetry Breaking with Gauge-Mediated Supersymmetry Breaking
• Stability, Higgs Boson Mass and New Physics
• Hints of large tan(beta) in flavour physics
• A Solution to the Supersymmetric Fine-Tuning Problem within the MSSM
• Averages of b-hadron, c-hadron, and tau-lepton Properties
• Correlation of B_s -> mu^+ mu^- and (g-2)_mu in Minimal Supergravity
• Gravitino Dark Matter and Cosmological Constraints
• Vevacious: A Tool For Finding The Global Minima Of One-Loop Effective Potentials With Many Scalars
• Bound-State Effects on Light-Element Abundances in Gravitino Dark Matter Scenarios
• $b\to s\gamma$ Constraints on the Minimal Supergravity Model with Large $\tan \beta$
• Gravitino Dark Matter in the CMSSM and Implications for Leptogenesis and the LHC
• On Naturalness of the MSSM and NMSSM
• Gravitino Dark Matter in the CMSSM With Improved Constraints from BBN
• Dark matter allowed scenarios for Yukawa-unified SO(10) SUSY GUTs
• Post-LHC7 fine-tuning in the mSUGRA/CMSSM model with a 125 GeV Higgs boson
• Stability of the CMSSM against sfermion VEVs
• Fittino, a program for determining MSSM parameters from collider observables using an iterative method
• Anatomy of maximal stop mixing in the MSSM
• Vacuum Stability and Higgs Diphoton Decays in the MSSM
• The CMSSM and NUHM1 after LHC Run 1
• Signals for the Minimal Gauge-mediated Supersymmetry Breaking Model at the Fermilab Tevatron Collider
• Constrained Supersymmetry after two years of LHC data: a global view with Fittino
• Higgs-mediated leptonic decays of B_s and B_d mesons as probes of supersymmetry
• Flavour physics at large tan(beta) with a Bino-like LSP
• Naturalness and Focus Points with Non-Universal Gaugino Masses
• Unification Picture in Minimal Supersymmetric SU(5) Model with String Remnants
• Relaxed fine-tuning in models with non-universal gaugino masses
• On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios
• Big-Bang Nucleosynthesis with Long-Lived Charged Slepton
• Fine tuning as an indication of physics beyond the MSSM
• Constraining the MSSM with universal gaugino masses and implication for searches at the LHC
• A Natural 125 GeV Higgs Boson in the MSSM from Focus Point Supersymmetry with A-Terms
• Implications of Catalyzed BBN in the CMSSM with Gravitino Dark Matter
• Natural SUSY Predicts: Higgs Couplings
• Cosmological Constraints on Gravitino LSP Scenario with Sneutrino NLSP
• Non-Universal Gaugino Masses and Natural Supersymmetry
• Naturalness of the Non-Universal MSSM in the light of the recent Higgs results
• Viable $t$-$b$-$\tau$ Yukawa Unification in SUSY SO(10)
• Higgs and Sparticle Spectroscopy with Gauge-Yukawa Unification
• Non-universal gaugino masses, the supersymmetric little hierarchy problem, and dark matter
• The fine-tuning cost of the likelihood in SUSY models
• Constraints from Charge and Colour Breaking Minima in the (M+1)SSM
• Sneutrino NLSP Scenarios in the NUHM with Gravitino Dark Matter
• Stop on Top
• Is Natural SUSY Natural?
• Tuning supersymmetric models at the LHC: A comparative analysis at two-loop level
• The Fermi scale as a focus point of high-scale gauge mediation
• Optimising Stop Naturalness
• Impact of LHC Searches on NLSP Top Squark and Gluino Mass
• Fine Tuning in the Constrained Exceptional Supersymmetric Standard Model
• Gravitino cosmology with a very light neutralino
• Amelioration of Little Hierarchy Problem in SU(4)_c x SU(2)_L x SU(2)_R
• SO(10) as a Framework for Natural Supersymmetry
• 125 GeV Higgs as a pseudo-Goldstone boson in supersymmetry with vector-like matters
• Single-Scale Natural SUSY
• Natural supersymmetric spectrum in mirage mediation
• Singlet Extension of the MSSM for 125 GeV Higgs Mass with the Least Tuning
• Electroweak Supersymmetry around the Electroweak Scale
• Naturalness, b to s gamma, and SUSY Heavy Higgses
• Hitting sbottom in natural SUSY
• Peccei-Quinn NMSSM in the light of 125 GeV Higgs
• Fixing the EW scale in supersymmetric models after the Higgs discovery
• Long-Lived stop at the LHC with or without R-parity
• Light Top Squark in Precision Top Quark Sample
• Higgs and non-universal gaugino masses: no SUSY signal expected yet?
• Top Quark and Higgs Boson Masses in Supersymmetric Models
• Heavy superpartners with less tuning from hidden sector renormalisation

Cited by in corpus (14)

• Global fits of GUT-scale SUSY models with GAMBIT
• Identifying WIMP dark matter from particle and astroparticle data
• A top-squark hunter's guide
• Mass Spectrum and Higgs Profile in BLSSM
• Light Stops and Observation of Supersymmetry at LHC RUN-II
• Generalized Soft Breaking Leverage for the MSSM
• Muon g-2 in an Alternative Quasi-Yukawa Unification with Low Fine-Tuned Inverse SeeSaw Mechanism
• Large BR(h -> tau mu) in Supersymmetric Models
• Quasi Yukawa Unification and Fine-Tuning in U(1) Extended SSM
• Least Fine-Tuned U(1) Extended SSM
• Muon g-2 in GMSB with Adjoint Messengers
• Low Fine-Tuning with Heavy Higgsinos in Yukawa Unified SUSY GUTs
• Searching for supersymmetry scalelessly
• Stop Search in SUSY SO(10) GUTs with Nonuniversal Gaugino Masses