V-completion by classicalization

Gia Dvali, Gian F. Giudice, Cesar Gomez, Alex Kehagias

    Research output: Contribution to journalArticle

    Abstract

    We suggest a novel approach to UV-completion of a class of non-renormalizable theories, according to which the high-energy scattering amplitudes get unitarized by production of extended classical objects (classicalons), playing a role analogous to black holes, in the case of non-gravitational theories. The key property of classicalization is the existence of a classicalizer field that couples to energy-momentum sources. Such localized sources are excited in high-energy scattering processes and lead to the formation of classicalons. Two kinds of natural classicalizers are Nambu-Goldstone bosons (or, equivalently, longitudinal polarizations of massive gauge fields) and scalars coupled to energy-momentum type sources. Classicalization has interesting phenomenological applications for the UVcompletion of the StandardModel both with or without the Higgs. In the Higgless Standard Model the high-energy scattering amplitudes of longitudinal W-bosons self-unitarize via classicalization, without the help of any new weakly-coupled physics. Alternatively, in the presence of a Higgs boson, classicalization could explain the stabilization of the hierarchy. In both scenarios the high-energy scatterings are dominated by the formation of classicalons, which subsequently decay into many particle states. The experimental signatures at the LHC are quite distinctive, with sharp differences in the two cases.

    Original languageEnglish (US)
    Article number108
    JournalJournal of High Energy Physics
    Volume2011
    Issue number8
    DOIs
    StatePublished - 2011

    Keywords

    • Phenomenological Models

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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  • Cite this

    Dvali, G., Giudice, G. F., Gomez, C., & Kehagias, A. (2011). V-completion by classicalization. Journal of High Energy Physics, 2011(8), [108]. https://doi.org/10.1007/JHEP08(2011)108