Soft Yukawa couplings in supersymmetric theories

Francesca Borzumati, Glennys R. Farrar, Nir Polonsky, Scott Thomas

    Research output: Contribution to journalArticle

    Abstract

    The possibility of radiatively generated fermion masses arising from chiral flavor violation in soft supersymmetry-breaking terms is explored. Vacuum stability constraints are considered in various classes of models, and allow in principle all of the first-and second-generation quarks and leptons and the b-quark to obtain masses radiatively. Radiatively induced Higgs-fermion couplings have non-trivial momentum-dependent form factors, which at low momentum are enhanced with respect to the case of tree-level Yukawa couplings. These form factors may be probed by various sum rules and relations among Higgs boson decay widths and branching ratios to fermion final states. An apparent, large, hard violation of supersymmetry also results for Higgsino couplings. Mixing between left-and right-handed scalar superpartners is enhanced. A radiative muon mass is shown to lead to a relatively large and potentially measurable contribution to the muon anomalous magnetic moment. If the light-quark masses arise radiatively, the neutron electric dipole moment is suppressed by a natural phase alignment between the masses and dipole moment, and is below the current experimental bound. The possibility of neutrino masses arising from softly broken lepton number, and concomitant enhanced sneutrino-antisneutrino oscillations, is briefly discussed.

    Original languageEnglish (US)
    Pages (from-to)53-115
    Number of pages63
    JournalNuclear Physics, Section B
    Volume555
    Issue number1-2
    StatePublished - Aug 23 1999

    Fingerprint

    fermions
    quarks
    supersymmetry
    form factors
    leptons
    muons
    dipole moments
    momentum
    electric moments
    Higgs bosons
    electric dipoles
    sum rules
    neutrinos
    magnetic moments
    alignment
    scalars
    moments
    neutrons
    vacuum
    oscillations

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Borzumati, F., Farrar, G. R., Polonsky, N., & Thomas, S. (1999). Soft Yukawa couplings in supersymmetric theories. Nuclear Physics, Section B, 555(1-2), 53-115.

    Soft Yukawa couplings in supersymmetric theories. / Borzumati, Francesca; Farrar, Glennys R.; Polonsky, Nir; Thomas, Scott.

    In: Nuclear Physics, Section B, Vol. 555, No. 1-2, 23.08.1999, p. 53-115.

    Research output: Contribution to journalArticle

    Borzumati, F, Farrar, GR, Polonsky, N & Thomas, S 1999, 'Soft Yukawa couplings in supersymmetric theories', Nuclear Physics, Section B, vol. 555, no. 1-2, pp. 53-115.
    Borzumati F, Farrar GR, Polonsky N, Thomas S. Soft Yukawa couplings in supersymmetric theories. Nuclear Physics, Section B. 1999 Aug 23;555(1-2):53-115.
    Borzumati, Francesca ; Farrar, Glennys R. ; Polonsky, Nir ; Thomas, Scott. / Soft Yukawa couplings in supersymmetric theories. In: Nuclear Physics, Section B. 1999 ; Vol. 555, No. 1-2. pp. 53-115.
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