A natural SUSY Higgs near 125 GeV

By L. Hall, D. Pinner, J. Ruderman. 2011

538 citations recorded by the source corpus.

A bstractThe naturalness of a Higgs boson with a mass near 125 GeV is explored in a variety of weak-scale supersymmetric models. A Higgs mass of this size strongly points towards a non-minimal implementation of supersymmetry. The Minimal Supersymmetric Standard Model now requires large A-terms to avoid multi-TeV stops. The fine-tuning is at least 1 % for low messenger scales, and an order of magnitude worse for high messenger scales. Naturalness is significantly improved in theories with a singlet superfield S coupled to the Higgs superfields via λSHuHd. If λ is perturbative up to unified scales, a fine-tuning of about 10 % is possible with a low mediation scale. Larger values of λ, implying new strong interactions below unified scales, allow for a highly natural 125 GeV Higgs boson over a wide range of parameters. Even for λ as large as 2, where a heavier Higgs might be expected, a light Higgs boson naturally results from singlet-doublet scalar mixing. Although the Higgs is light, naturalness allows for stops as heavy as 1.5 TeV and a gluino as heavy as 3 TeV. Non-decoupling effects among the Higgs doublets can significantly suppress the coupling of the light Higgs to b quarks in theories with a large λ, enhancing the γγ and W W signal rates at the LHC by an order one factor relative to the Standard Model Higgs.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e6936cd5fb036ea8486393cdde130fc802e8294b

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In Astronomy and Astrophysics

1. Lian-tao Wang
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In Nuclear and High Energy Physics

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Citations in the corpus

• Twin Higgs mechanism and a composite Higgs boson (2015, background): “This is particularly true for the case of Natural SUSY [1,2], where light stops are generally required.”
• Neutralino dark matter at 14 TeV and 100 TeV (2014, background): “At hadron colliders such as the Large Hadron Collider (LHC), the pair production of colored superpartners, squarks and gluinos, are the dominant SUSY processes.”