Classicalization of gravitons and Goldstones

Gia Dvali, Cesar Gomez, Alex Kehagiasf

    Research output: Contribution to journalArticlepeer-review


    We establish a close parallel between classicalization of gravitons and derivatively-coupled Nambu-Goldstone-type scalars. We show, that black hole formation in high energy scattering process represents classicalization with the classicalization radius given by Schwarzschild radius of center of mass energy, and with the precursor of black hole entropy being given by number of soft quanta composing this classical configuration. Such an entropy-equivalent is defined for scalar classicalons also and is responsible for exponential suppression of their decay into small number of final particles. This parallel works in both ways. For optimists that are willing to hypothesize that gravity may indeed selfunitarize at high energies via black hole formation, it illustrates that the Goldstones may not be much different in this respect, and they classicalize essentially by similar dynamics as gravitons. In the other direction, it may serve as an useful de-mystifier of via-blackhole- unitarization process and of the role of entropy in it, as it illustrates, that much more prosaic scalar theories essentially do the same. Finally, it illustrates that in both cases classicalization is the defining property for unitarization, and that it sets-in before one can talk about accompanying properties, such as entropy and thermality of static classicalons (black holes). These properties are by-products of classicalization, and their equivalents can be defined for non-gravitational cases of classicalization.

    Original languageEnglish (US)
    Article number070
    JournalJournal of High Energy Physics
    Issue number11
    StatePublished - 2011


    • Black Holes
    • Nonperturbative Effects
    • Solitons Monopoles and Instantons

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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