Skip to main content
eScholarship
Open Access Publications from the University of California

The mD-bM problem of Dirac gauginos and its solutions

  • Author(s): Csáki, C
  • Goodman, J
  • Pavesi, R
  • Shirman, Y
  • et al.
Abstract

We examine the effective low-energy theory of the adjoint sector of Dirac gaugino models and its UV completions, and identify the main source of tuning. A holomorphic scalar adjoint mass square (the "bM term") is generated at the same order (one-loop) as the Dirac gaugino mass (the "mD term"), leading to the problematic relation bM∼16π2mD2, somewhat analogous to the μ-Bμ problem of gauge mediation. We identify the leading operators of the low-energy effective theory contributing to the adjoint sector, and evaluate them in various UV completions, confirming the existence of this problem. We suggest a solution by introducing messenger mixing and tuning the relevant parameters. We also present a novel dynamical model for Dirac gauginos based on a strongly coupled supersymmetric (SUSY) QCD theory, where the additional adjoint M is identified with a confined meson, the U(1) with a baryon number-like symmetry, and the messengers with the confined baryons. We find a SUSY-breaking vacuum with a nonvanishing D term, which after tuning the messenger mixing angles gives rise to a realistic gaugino and squark sector. © 2014 American Physical Society.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View