Partially natural Two Higgs Doublet Models

Patrick Draper, Howard E. Haber, Joshua T. Ruderman

    Research output: Contribution to journalArticlepeer-review


    Abstract: It is possible that the electroweak scale is low due to the fine-tuning of microscopic parameters, which can result from selection effects. The experimental discovery of new light fundamental scalars other than the Standard Model Higgs boson would seem to disfavor this possibility, since generically such states imply parametrically worse fine-tuning with no compelling connection to selection effects. We discuss counterexamples where the Higgs boson is light because of fine-tuning, and a second scalar doublet is light because a discrete symmetry relates its mass to the mass of the Standard Model Higgs boson. Our examples require new vectorlike fermions at the electroweak scale, and the models possess a rich electroweak vacuum structure. The mechanism that we discuss does not protect a small CP-odd Higgs mass in split or high-scale supersymmetry-breaking scenarios of the MSSM due to an incompatibility between the discrete symmetries and holomorphy.

    Original languageEnglish (US)
    Article number124
    JournalJournal of High Energy Physics
    Issue number6
    StatePublished - Jun 1 2016


    • Beyond Standard Model
    • Higgs Physics

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


    Dive into the research topics of 'Partially natural Two Higgs Doublet Models'. Together they form a unique fingerprint.

    Cite this