Topologically Stable Z - Strings in the Supersymmetric Standard Model

Abstract

We show that the minimal supergravity extension of the standard model automatically contains topologically stable electroweak strings if the hidden sector is invariant under the exact R-symmetry. These defects appear in the form of the semiglobal R-strings, which necessarily carry $Z$-flux inside their core. This result is independent from the particular structure of the hidden sector. Discussed strings differ fundamentally from the embedded $Z$-strings. If R-symmetry is explicitly broken (e.g. due to an anomaly), the decay of the semiglobal strings may have important implications for the baryogenesis.

LaTeX, 17 pages, IC/94/56

References in corpus (5)

• Cosmological Implications of Dynamical Supersymmetry Breaking
• Electroweak Baryogenesis with Electroweak Strings
• Semilocal Defects
• Topologically Stable Electroweak Flux Tube
• Stability of Two Doublet Electroweak Strings

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• Topological Nambu monopole in two Higgs doublet models
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• Stable $Z$-strings with topological polarization in two Higgs doublet model
• Topological structure of Nambu monopole in Two Higgs doublet models -- Fiber bundle, Dirac's quantization and dyon --
• Aharonov-Bohm defects
• R-charge Kills Monopoles
• Cosmological Implications of Low Energy Supersymmetry Breaking Models
• Effect of Quark Scatter on Baryogenesis by Electroweak Strings
• Stability of the embedded string in the $SU(N)\times U(1)$ Higgs model and its application
• Thermal dark matter abundance under non-standard macroscopic conditions in the early universe
• Scattering from Electroweak Strings
• Semiglobal Alice Strings