A Mechanism for Baryogenesis in Low Energy Supersymmetry Breaking Models

Abstract

A generic prediction of models where supersymmetry is broken at scales within a few orders of magnitude of the weak scale and is fed down to the observable sector by gauge interactions is the existence of superconducting cosmic strings which carry baryon number. In this paper we propose a novel mechanism for the generation of the baryon asymmetry which takes place at temperatures much lower than the weak scale. Superconducting strings act like ``bags'' containing the baryon charge and protect it from sphaleron wash-out throughout the evolution of the Universe, until baryon number violating processes become harmless. This mechanism is efficient even if the electroweak phase transition in the MSSM is of the second order and therefore does not impose any upper bound on the mass of the Higgs boson. (13kb)

arXiv commentLaTeX file, 17 pages. One ref. added

References in corpus (13)

• Cosmic strings
• Baryogenesis from Flat Directions of the Supersymmetric Standard Model
• The More Minimal Supersymmetric Standard Model
• Anomalous U(1) as a mediator of Supersymmetry Breaking
• Topological Defects and Structure Formation
• Electroweak baryogenesis and low energy supersymmetry
• Cosmic Vortons and Particle Physics Constraints
• Magnetic Fields from Phase Transitions
• Local and Nonlocal Defect-Mediated Electroweak Baryogenesis
• Anomalous $U(1)$ Mediated SUSY Breaking, Fermion Masses and Natural Suppression of FCNC and CP Violating Effects
• Particle Physics Models, Topological Defects and Electroweak Baryogenesis
• Cosmological Implications of Low Energy Supersymmetry Breaking Models
• Baryon Number Violating Transitions in String Backgrounds

Cited by in corpus (13)

• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• Recent Progress in Baryogenesis
• Non-thermal Production of Neutralino Cold Dark Matter from Cosmic String Decays
• Anomalous Global Strings and Primordial Magnetic Fields
• Fermion Masses and Gauge Mediated Supersymmetry Breaking from a Single U(1)
• Non-Thermal Production of WIMPs, Cosmic $e^{\pm }$ Excesses and $\gamma$-rays from the Galactic Center
• Electroweak baryogenesis mediated by locally supersymmetry-breaking defects
• Moduli from Cosmic Strings
• Topological Defects and Cosmology
• Gamma-rays From Warm WIMP Dark Matter Annihilation
• Effect of pre-existing baryon inhomogeneities on the dynamics of quark-hadron transition
• Baryogenesis through gradual collapse of vortons
• Decay of baryon inhomogeneities in an expanding universe