Metastable strings and dumbbells in supersymmetric hybrid inflation

2021/02/28 by Wilfried Buchmuller, Wilfried Buchmüller
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmic string #Cosmology and Gravitation Theories #Electroweak interaction #Gravitational wave #Gravitational wave background #Inflation (cosmology) #Metastability #Pulsars and Gravitational Waves Research #String (physics) #Symmetry (geometry) #Symmetry breaking #Topological defect #astro-ph.CO #hep-ph #hep-th

paper · pdf · doi:10.1007/jhep04(2021)168

20 pages, typos corrected

openalex created_date 2021/03/01 · arxiv created 2021/03/03 · openalex publication_date 2021/04/01 · arxiv updated 2021/05/05 · openalex updated_date 2026/08/06

Abstract

A bstract We study symmetry breaking and topological defects in a supersymmetric model with gauge group U(2), which can be identified with the right-handed part SU(2) R × U(1) B−L of an extended electroweak symmetry of the Standard Model. The model has two phases of hybrid inflation terminated by tachyonic preheating where either monopoles and strings or, alternatively, dumbbells are formed. In the first case a stochastic gravitational wave background is predicted in the LIGO-Virgo band, possibly extending to the LISA frequency band and to nanohertz frequencies, which is generated by a metastable cosmic string network. In the second case no topological defects survive inflation and no stochastic gravitational wave background is produced.

Citations

• Number of cosmic string loops
• Electric-magnetic duality, monopole condensation, and confinement in N=2 supersymmetric Yang-Mills theory
• Vortex-line models for dual strings
• Magnetic monopoles in unified gauge theories
• Minimal supersymmetric left–right model with automatic R-parity
• Spontaneous breaking of a metastable string
• Topological incarnations of electroweak defects
• Topology of cosmic domains and strings
• Monopoles on strings