Gravitational Waves from Quasi-stable Strings

Abstract

We estimate the stochastic gravitational wave spectrum emitted from a network of cosmic strings in which the latter are effectively stable against breaking by monopole pair creation. The monopoles are produced at a higher scale from an earlier symmetry breaking and experience significant inflation before reentering the horizon. This gives rise to monopole-antimonopole pairs connected by string segments and the string loop formation essentially ceases. As a consequence, the lower frequency portion of the gravitational wave spectrum is suppressed relative to the no-inflation case with stable strings, which evades the stringent PPTA bound on the dimensionless string tension $G\mu$. We display the modified spectrum, accessible in the ongoing and future experiments, for $G\mu$ values in the range $10^{-10}-10^{-15}$. We show how this `quasi-stable' string network is realized in realistic grand unified theories.

arXiv comment18 pages, 7 figures, published version

References in corpus (48)

• Planck 2018 results. X. Constraints on inflation
• Cosmic strings
• Beyond LISA: Exploring Future Gravitational Wave Missions
• Sensitivity curves for searches for gravitational-wave backgrounds
• Detecting the Cosmic Gravitational Wave Background with the Big Bang Observer
• Gravitational waves from binary supermassive black holes missing in pulsar observations
• Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
• Cosmological Backgrounds of Gravitational Waves and eLISA/NGO: Phase Transitions, Cosmic Strings and Other Sources
• The number of cosmic string loops
• New Sensitivity Curves for Gravitational-Wave Signals from Cosmological Phase Transitions
• Probing the gravitational wave background from cosmic strings with LISA
• Gravitational-Wave Stochastic Background from Kinks and Cusps on Cosmic Strings
• Stochastic gravitational wave background from smoothed cosmic string loops
• Constraints on cosmic strings using data from the third Advanced LIGO-Virgo observing run
• New limits on cosmic strings from gravitational wave observation
• From NANOGrav to LIGO with metastable cosmic strings
• Constraints on cosmic strings using data from the first Advanced LIGO observing run
• Digging deeper: Observing primordial gravitational waves below the binary black hole produced stochastic background
• Probing the pre-BBN universe with gravitational waves from cosmic strings
• Gravitational wave bursts from cosmic (super)strings: Quantitative analysis and constraints
• CMB constraints on cosmic strings and superstrings
• Probing the scale of grand unification with gravitational waves
• Gravitational Waves from Broken Cosmic Strings: The Bursts and the Beads
• Stochastic gravitational-wave background from metastable cosmic strings
• Stochastic gravitational waves from cosmic string loops in scaling
• Fingerprint of Low-Scale Leptogenesis in the Primordial Gravitational-Wave Spectrum
• New CMB constraints for Abelian Higgs cosmic strings
• Gravitational waves and proton decay: complementary windows into GUTs
• Unification, Proton Decay and Topological Defects in non-SUSY GUTs with Thresholds
• Gravitational Wave Bursts as Harbingers of Cosmic Strings Diluted by Inflation
• Gravitational wave background from hybrid topological defects
• Gravitational radiation from monopoles connected by strings
• The spontaneous breaking of a metastable string
• Signature of inflation in the stochastic gravitational wave background generated by cosmic string networks
• Roadmap of left-right models based on GUTs
• Primordial Monopoles and Strings, Inflation, and Gravity Waves
• Monopoles, Strings, and Necklaces in $SO(10)$ and $E_6$
• ET sensitivity to the anisotropic Stochastic Gravitational Wave Background
• Cosmic Strings, Inflation, and Gravity Waves
• Sneutrino Tribrid Inflation, Metastable Cosmic Strings and Gravitational Waves
• Primordial monopoles, proton decay, gravity waves and GUT inflation
• $\mu$-hybrid Inflation, Gravitino Dark Matter and Stochastic Gravitational Wave Background from Cosmic Strings
• Metastable strings and dumbbells in supersymmetric hybrid inflation
• Constraining the Cosmic Strings Gravitational Wave Spectra in No Scale Inflation with Viable Gravitino Dark matter and Non Thermal Leptogenesis
• GUTs with dim-5 interactions: Gauge Unification and Intermediate Scales
• Destruction of a metastable string by particle collisions
• Triply Charged Monopole and Magnetic Quarks
• Planck Limits on Cosmic String Tension Using Machine Learning

Cited by in corpus (4)

• Cosmic strings from pure Yang-Mills theory
• Monopoles, Strings and Gravitational Waves in Non-minimal Inflation
• A Predictive and Testable Unified Theory of Fermion Masses, Mixing and Leptogenesis
• Probing Minimal Grand Unification through Gravitational Waves, Proton Decay, and Fermion Masses