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Fermion masses and gauge mediated supersymmetry breaking from a single U(1)

D. Elazzar Kaplan

François Lepeintre

Antonio Masiero

Ann E. Nelson

Antonio Riotto*

  • Department of Physics 1560, University of Washington, Seattle, Washington 98195-1560

  • Institute for Nuclear Theory 1550, University of Washington, Seattle, Washington 98195-1550

  • SISSA, Via Beirut 2-4, I-34013 Trieste, Italy
  • INFN, sezione Trieste, Italy

  • Department of Physics 1560, University of Washington, Seattle, Washington 98195-1560

  • Theory Division, CERN, CH-1211 Geneva 23, Switzerland

  • *On leave from Department of Theoretical Physics, University of Oxford, U.K.
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Phys. Rev. D 60, 055003 – Published 29 July, 1999

DOI: https://doi.org/10.1103/PhysRevD.60.055003

Abstract

We present a supersymmetric model of flavor. A single U(1) gauge group is responsible for both generating the flavor spectrum and communicating supersymmetry breaking to the visible sector. The problem of flavor changing neutral currents is overcome, in part using an “effective supersymmetry” spectrum among the squarks, with the first two generations very heavy. All masses are generated dynamically and the theory is completely renormalizable. The model contains a simple Froggatt-Nielsen sector and communicates supersymmetry breaking via gauge mediation without requiring a separate messenger sector. By forcing the theory to be consistent with SU(5) grand unification, the model predicts a large tanβ and a massless up quark. While respecting the experimental bounds on CP violation in the K system, the model leads to a large enhancement of CP violation in B−B¯ mixing as well as in B decay amplitudes.

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Outline

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Phys. Rev. D 60, 055003– Published 29 July, 1999
  • Received 17 July 1998

© 1999 American Physical Society

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