Strong CP problem with 1032 standard model copies

Gia Dvali, Glennys R. Farrar

    Research output: Contribution to journalArticle

    Abstract

    We show that a recently proposed solution to the hierarchy problem simultaneously solves the strong CP problem, without requiring an axion or any further new physics. Consistency of black hole physics implies a nontrivial relation between the number of particle species and particle masses, so that with ∼1032 copies of the standard model, the TeV scale is naturally explained. At the same time, as shown here, this setup predicts a typical expected value of the strong-CP parameter in QCD of θ∼10-9. This strongly motivates a more sensitive measurement of the neutron electric dipole moment.

    Original languageEnglish (US)
    Article number011801
    JournalPhysical Review Letters
    Volume101
    Issue number1
    DOIs
    StatePublished - Jul 1 2008

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    physics
    particle mass
    electric moments
    electric dipoles
    hierarchies
    dipole moments
    quantum chromodynamics
    neutrons

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Strong CP problem with 1032 standard model copies. / Dvali, Gia; Farrar, Glennys R.

    In: Physical Review Letters, Vol. 101, No. 1, 011801, 01.07.2008.

    Research output: Contribution to journalArticle

    Dvali, Gia ; Farrar, Glennys R. / Strong CP problem with 1032 standard model copies. In: Physical Review Letters. 2008 ; Vol. 101, No. 1.
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