Naturalness in low-scale SUSY models and "non-linear" MSSM

Abstract

In MSSM models with various boundary conditions for the soft breaking terms (m_{soft}) and for a higgs mass of 126 GeV, there is a (minimal) electroweak fine-tuning Delta\approx 800 to 1000 for the constrained MSSM and Delta\approx 500 for non-universal gaugino masses. These values, often regarded as unacceptably large, may indicate a problem of supersymmetry (SUSY) breaking, rather than of SUSY itself. A minimal modification of these models is to lower the SUSY breaking scale in the hidden sector (\sqrt f) to few TeV, which we show to restore naturalness to more acceptable levels Delta\approx 80 for the most conservative case of low tan_beta and ultraviolet boundary conditions as in the constrained MSSM. This is done without introducing additional fields in the visible sector, unlike other models that attempt to reduce Delta. In the present case Delta is reduced due to additional (effective) quartic higgs couplings proportional to the ratio m_{soft}/(\sqrt f) of the visible to the hidden sector SUSY breaking scales. These couplings are generated by the auxiliary component of the goldstino superfield. The model is discussed in the limit its sgoldstino component is integrated out so this superfield is realized non-linearly (hence the name of the model) while the other MSSM superfields are in their linear realization. By increasing the hidden sector scale \sqrt f one obtains a continuous transition for fine-tuning values, from this model to the usual (gravity mediated) MSSM-like models.

arXiv comment20 pages, 7 figures

References in corpus (55)

• 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
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Towards High-Precision Predictions for the MSSM Higgs Sector
• From Linear SUSY to Constrained Superfields
• Radiative natural SUSY with a 125 GeV Higgs boson
• Axinos as Dark Matter
• Measures of fine tuning
• Naturalness Implications of LEP Results
• MSSM Higgs Physics at Higher Orders
• Higgs Physics as a Window Beyond the MSSM (BMSSM)
• Low-scale supersymmetry breaking: effective description, electroweak breaking and phenomenology
• Living Dangerously with Low-Energy Supersymmetry
• SUSY models under siege: LHC constraints and electroweak fine-tuning
• Fitting the Phenomenological MSSM
• The fine-tuning of the generalised NMSSM
• The MSSM fine tuning problem: a way out
• The fine-tuning price of LEP
• About the fine-tuning price of LEP
• Naturalness and superpartner masses or when to give up on weak scale supersymmetry
• Haggling over the fine-tuning price
• Natural Priors, CMSSM Fits and LHC Weather Forecasts
• Constrained Supersymmetry after two years of LHC data: a global view with Fittino
• Naturalness and Focus Points with Non-Universal Gaugino Masses
• Bayesian approach and Naturalness in MSSM analyses for the LHC
• Fine tuning as an indication of physics beyond the MSSM
• Non-linear MSSM
• MSSM with Dimension-five Operators (MSSM_5)
• Supersymmetric Models with Higher Dimensional Operators
• On the effective interactions of a light gravitino with matter fermions
• Non-universal gaugino masses and fine tuning implications for SUSY searches in the MSSM and the GNMSSM
• Goldstino Couplings to Matter
• MSSM Higgs with dimension-six operators
• Testing SUSY at the LHC: Electroweak and Dark matter fine tuning at two-loop order
• On the Interactions of Light Gravitinos
• Fine-tuning implications for complementary dark matter and LHC SUSY searches
• Phenomenology of a leptonic goldstino and invisible Higgs boson decays
• The fine-tuning cost of the likelihood in SUSY models
• Supersymmetric Higgs Bosons and Beyond
• Tuning supersymmetric models at the LHC: A comparative analysis at two-loop level
• Beyond the MSSM Higgs with d=6 effective operators
• MSSM Forecast for the LHC
• The MSSM Higgs Sector with a Dynamical Goldstino Supermultiplet
• On sgoldstino interpretation of HyperCP events
• On non-universal Goldstino couplings to matter
• Effective Lagrangians and Light Gravitino Phenomenology
• Testing SUSY
• Thermal leptogenesis and the gravitino problem in the Asaka-Yanagida axion/axino dark matter scenario
• Goldstino and sgoldstino in microscopic models and the constrained superfields formalism
• BMSSM Higgs Bosons at the Tevatron and the LHC
• Low-scale SUSY breaking and the (s)goldstino physics
• A review of naturalness and dark matter prediction for the Higgs mass in MSSM and beyond
• Fixing the EW scale in supersymmetric models after the Higgs discovery
• Radiative natural supersymmetry with mixed axion/higgsino cold dark matter
• SUSY naturalness without prejudice

Cited by in corpus (8)

• Uncovering Natural Supersymmetry via the interplay between the LHC and Direct Dark Matter Detection
• What is a Natural SUSY scenario?
• Sgoldstino-Higgs mixing in models with low-scale supersymmetry breaking
• Bayesian naturalness, simplicity, and testability applied to the $B-L$ MSSM GUT
• Lepton flavor-violating decays of the Higgs boson from sgoldstino mixing
• Sgoldstino signature in $hh$, $W^{+}{W}^{-}$ and $ZZ$ spectra at the LHC
• Higgs-Portal Dark Matter in Nonlinear MSSM
• Multilepton and multiphoton signatures of supersymmetry at the LHC