Kinetic mixing and the supersymmetric gauge hierarchy

Keith R. Dienes, Christopher Kolda, John March-Russell

Research output: Contribution to journalArticle

295 Scopus citations

Abstract

The most general Lagrangian for a model with two U(1) gauge symmetries contains a renormalizable operator which mixes their gauge kinetic terms. Such kinetic mixing can be generated at arbitrarily high scales but will not be suppressed by large masses. In models whose supersymmetry (SUSY)-breaking hidden sectors contain U(1) gauge factors, we show that such terms will generically arise and communicate SUSY breaking to the visible sector through mixing with hypercharge. In the context of the usual supergravity- or gauge-mediated communication scenarios with D-terms of order the fundamental scale of SUSY breaking, this effect can destabilize the gauge hierarchy. Even in models for which kinetic mixing is suppressed or the D-terms are arranged to be small, this effect is a potentially large correction to the soft scalar masses and therefore introduces a new measurable low-energy parameter. We calculate the size of kinetic mixing both in field theory and in string theory, and argue that appreciable kinetic mixing is a generic feature of string models. We conclude that the possibility of kinetic mixing effects cannot be ignored in model building and in phenomenological studies of the low-energy SUSY spectra.

Original languageEnglish (US)
Pages (from-to)104-118
Number of pages15
JournalNuclear Physics B
Volume492
Issue number1-2
DOIs
StatePublished - May 12 1997
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Kinetic mixing and the supersymmetric gauge hierarchy'. Together they form a unique fingerprint.

  • Cite this