Implications of naturalness for the heavy Higgs bosons of supersymmetry

2014/07/15 by Kyu Jung Bae, Howard Baer, V. Barger +3
Physics and Astronomy · #Boson #Branching fraction #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Electroweak scale #Higgs boson #Minimal Supersymmetric Standard Model #Naturalness #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Supersymmetry #hep-ph

paper · pdf · doi:10.1103/physrevd.90.075010

published as Phys. Rev. D 90, 075010 (2014) · 18 pages with 7 figures

arxiv created 2014/07/15 · openalex publication_date 2014/10/14 · arxiv updated 2014/10/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Recently, it has been argued that various measures of supersymmetric naturalness---electroweak, Higgs mass and EENZ/BG---when applied consistently, concur with one another and make very specific predictions for natural supersymmetric spectra. Highly natural spectra are characterized by light Higgsinos with mass not too far from m_h and well-mixed but TeV-scale third generation squarks. We apply the unified naturalness measure to the case of heavy Higgs bosons A, H and H^\ifmmode±\else\textpm\fi. We find that their masses are bounded from above by naturalness depending on tan\ensuremathβ: e.g. for 10% fine-tuning and tan\ensuremathβ\ensuremath∼10, we expect m_A\ensuremath\lesssim2.5 TeV whilst for 3% fine-tuning and tan\ensuremathβ as high as 50, then m_A\ensuremath\lesssim8 TeV. Furthermore, the presence of light Higgsinos seriously alters the heavy Higgs boson branching ratios, thus diminishing prospects for usual searches into standard model final states, while new discovery possibilities arise due to the supersymmetric decay modes. The heavy supersymmetric decay modes tend to be H,A,H^\ifmmode±\else\textpm\fi\ensuremath→W,Z, or h+)E_T+soft tracks so that single heavy Higgs production is characterized by the presence of high p_T W, Z or h bosons plus missing E_T. These new heavy Higgs boson signatures seem to be challenging to extract from SM backgrounds.

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