Soft Yukawa couplings in supersymmetric theories

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

Research output: Contribution to journalArticle

142 Citations (Scopus)

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
Pages (from-to)53-115
Number of pages63
JournalNuclear Physics B
Volume555
Issue number1-2
DOIs
Publication statusPublished - 1999 Aug 23
Externally publishedYes

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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

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

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

Research output: Contribution to journalArticle

Borzumati, Francesca ; Farrar, Glennys R. ; Polonsky, Nir ; Thomas, Scott. / Soft Yukawa couplings in supersymmetric theories. In: Nuclear Physics B. 1999 ; Vol. 555, No. 1-2. pp. 53-115.
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