Relaxed fine-tuning in models with non-universal gaugino masses

Abstract

We study, in a bottom-up approach, the fine-tuning problem between soft SUSY breaking parameters and the $\mu$-term for the successful electroweak symmetry breaking in the minimal supersymmetric standard model. It is shown that certain nontrivial ratios between gaugino masses, that is non-universal gaugino masses, are necessary at the GUT scale, in order for the fine-tuning to be reduced above 10 % order. In addition, when all the gaugino masses should be regarded as independent ones in their origins, a small gluino mass $M_3\lesssim 120$ GeV and a non-vanishing $A$-term $A_t\sim O(M_3)$ associated to top squarks are also required at the GUT scale as well as the non-universality. On the other hand, when we consider some UV theory, which fixes ratios of soft SUSY breaking parameters as certain values with the overall magnitude, heavier spectra are allowed. It is favored that the gluino and wino masses are almost degenerate at the weak scale, while wider region of bino mass is favorable.

17 pages, 29 figures

References in corpus (10)

• De Sitter Vacua from Matter Superpotentials
• Moduli stabilization, F-term uplifting and soft supersymmetry breaking terms
• O'KKLT
• Twin SUSY
• A Supersymmetric Twin Higgs
• Living Dangerously with Low-Energy Supersymmetry
• TeV Scale Mirage Mediation and Natural Little SUSY Hierarchy
• Supersymmetry Breaking and Moduli Stabilization with Anomalous U(1) Gauge Symmetry
• Mediation of Supersymmetry Breaking in Gauge Messenger Models
• A Solution for Little Hierarchy Problem and b --> s gamma

Cited by in corpus (30)

• SUSY models under siege: LHC constraints and electroweak fine-tuning
• Non-universal gaugino masses from non-singlet F-terms in non-minimal unified models
• Supersymmetry, Naturalness, and Light Higgsinos
• More about F-term uplifting
• Naturalness of the Non-Universal MSSM in the light of the recent Higgs results
• Non-universal gaugino masses: a signal-based analysis for the Large Hadron Collider
• Top-squark in natural SUSY under current LHC run-2 data
• Supergravity gauge theories strike back: There is no crisis for SUSY but a new collider may be required for discovery
• A top-squark hunter's guide
• Amelioration of Little Hierarchy Problem in SU(4)_c x SU(2)_L x SU(2)_R
• Lepton number violating mSUGRA and neutrino masses
• Generalized Soft Breaking Leverage for the MSSM
• Stop on Top: SUSY Parameter Regions, Fine-Tuning Constraints
• A new approach to gauge coupling unification and proton decay
• Implications of naturalness for the heavy Higgs bosons of supersymmetry
• TeV scale partial mirage unification and neutralino dark matter
• The 126 GeV Higgs boson mass and naturalness in (deflected) mirage mediation
• Tagging a mono-top signature in Natural SUSY
• The Higgs boson mass and SUSY spectra in 10D SYM theory with magnetized extra dimensions
• Muon g-2 in GMSB with Adjoint Messengers
• Taking aim at the wino-higgsino plane with the LHC
• Exploring nearly degenerate higgsinos using mono-$Z/W$ signal
• Flavor physics induced by light $Z^{\prime }$ from SO(10) GUT
• Gauge Mediation Models with Adjoint Messengers
• On the eve of the LHC: conceptual questions in high-energy physics
• Upper Bounds on Gluino, Squark and Higgisino Masses in the Focus Point Gaugino Mediation with a Mild Fine Tuning $\Delta \le 100$
• Analysis of the TeV-scale mirage mediation with heavy superparticles
• Raising the Higgs Mass in Supersymmetry with t-t' Mixing
• Surviving scenario of stop decays for ATLAS $\ell +jets+E_T^{miss}$ search
• Supersymmetry with a Heavy Lightest Supersymmetric Particle