The price of being SM-like in SUSY

Abstract

We compute the tuning in supersymmetric models associated with the constraints from collider measurements of the Higgs couplings to fermions and gauge bosons. In supersymmetric models, a CP-even state with SM Higgs couplings mixes with additional, heavier CP-even states, causing deviations in the Higgs couplings from SM values. These deviations are reduced as the heavy states are decoupled with large soft masses, thereby exacerbating the tuning associated with the electroweak scale. This new source of tuning is different from that derived from collider limits on stops, gluinos and Higgsinos. It can be offset with large tan beta in the MSSM, however this compensating effect is limited in the NMSSM with a large Higgs-singlet coupling due to restrictions on large tan beta from electroweak precision tests. We derive a lower bound on this tuning and show that the level of precision of Higgs coupling measurements at the LHC will probe naturalness in the NMSSM at the few-percent level. This is comparable to the tuning derived from superpartner limits in models with a low messenger scale and split families. Instead the significant improvement in sensitivity of Higgs coupling measurements at the ILC will allow naturalness in these models to be constrained at the per-mille level, beyond any tuning derived from direct superpartner limits.

29 pages, 6 figures

References in corpus (2)

• Doubling down on naturalness with a supersymmetric twin Higgs
• Solving the mu problem with a heavy Higgs boson

Cited by in corpus (19)

• SUSY models under siege: LHC constraints and electroweak fine-tuning
• Non-thermal Histories and Implications for Structure Formation
• On the Alignment Limit of the NMSSM Higgs Sector
• Uncovering Natural Supersymmetry via the interplay between the LHC and Direct Dark Matter Detection
• Maximally Natural Supersymmetry
• Electric Dipole Moments in Natural Supersymmetry
• Composite Dark Matter and LHC Interplay
• A New Look at Higgs Constraints on Stops
• SUSY Implications from WIMP Annihilation into Scalars at the Galactic Centre
• On NMSSM Higgs Search Strategies at the LHC and the Mono-Higgs Signature in Particular
• Supergravity gauge theories strike back: There is no crisis for SUSY but a new collider may be required for discovery
• Prospects for Higgs coupling measurements in SUSY with radiatively-driven naturalness
• Light Higgsino Decays as a Probe of the NMSSM
• Naturalness, b to s gamma, and SUSY Heavy Higgses
• Natural Scherk-Schwarz Theories of the Weak Scale
• Phenomenology of NMSSM in TeV scale mirage mediation
• A natural SM-like 126 GeV Higgs via non-decoupling D-terms
• Rare Flavor Processes in Maximally Natural Supersymmetry
• A 125 GeV Fat Higgs at large $\tan \beta$