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R parity from the heterotic string.

Mary K Gaillard1

  • 1Department of Physics, University of California, Berkeley, California 94720, USA.

Physical Review Letters
|May 21, 2005
PubMed
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A residual discrete symmetry in supergravity, arising from gaugino condensation, may function as R parity. This symmetry is crucial for supersymmetric standard model extensions.

Area of Science:

  • Theoretical Physics
  • High-Energy Physics
  • String Theory

Background:

  • Supersymmetry breaking is essential for realistic particle physics models.
  • Gaugino condensation is a proposed mechanism for supersymmetry breaking in supergravity theories.
  • T-duality invariance is a key feature of string theory compactifications.

Purpose of the Study:

  • To investigate the implications of a residual discrete symmetry in T-duality invariant effective supergravity.
  • To explore the potential role of this symmetry as R parity in supersymmetric extensions of the Standard Model.

Main Methods:

  • Analysis of T-duality invariant effective supergravity theories.
  • Study of gaugino condensation as a supersymmetry breaking mechanism.
  • Identification and characterization of residual discrete symmetries.

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Main Results:

  • A residual discrete symmetry naturally emerges in this framework.
  • This symmetry exhibits properties consistent with the requirements for R parity.
  • The presence of R parity is significant for model building in supersymmetric theories.

Conclusions:

  • The identified discrete symmetry offers a compelling candidate for R parity.
  • This finding provides a potential link between string theory compactifications and observable particle physics phenomena.
  • Further investigation is warranted to fully explore the phenomenological consequences of this R parity candidate.