Gravitational Waves from Current-Carrying Cosmic Strings

Abstract

Cosmic strings are predicted by many Standard Model extensions involving the cosmological breaking of a symmetry with nontrivial first homotopy group and represent a potential source of primordial gravitational waves (GWs). Present efforts to model the GW signal from cosmic strings are often based on minimal models, such as, eg, the Nambu--Goto action that describes cosmic strings as exactly one-dimensional objects without any internal structure. In order to arrive at more realistic predictions, it is therefore necessary to consider nonminimal models that make an attempt at accounting for the microscopic properties of cosmic strings. With this goal in mind, we derive in this paper the GW spectrum emitted by current-carrying cosmic strings (CCCSs), which may form in a variety of cosmological scenarios. Our analysis is based on a generalized version of the velocity-dependent one-scale (VOS) model, which, in addition to the mean velocity and correlation length of the string network, also describes the evolution of a chiral (light-like) current. As we are able to show, the solutions of the VOS equations imply a temporarily growing fractional cosmic-string energy density, ${\Omega }_{\mathrm{cs}}$. This results in an enhanced GW signal across a broad frequency interval, whose boundaries are determined by the times of generation and decay of cosmic-string currents. Our findings have important implications for GW experiments in the Hz to MHz band and motivate the construction of realistic particle physics models that give rise to large currents on cosmic strings.

arXiv comment18 pages, 7 figures, 2 tables, matches published version

References in corpus (59)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Cosmic strings
• Laser Interferometer Space Antenna
• The NANOGrav 12.5-year Data Set: Search For An Isotropic Stochastic Gravitational-Wave Background
• Detecting the Cosmic Gravitational Wave Background with the Big Bang Observer
• Upper Limits on the Isotropic Gravitational-Wave Background from Advanced LIGO's and Advanced Virgo's Third Observing Run
• Challenges and Opportunities of Gravitational Wave Searches at MHz to GHz Frequencies
• Cosmology with the Laser Interferometer Space Antenna
• The number of cosmic string loops
• Planck 2013 results. XXV. Searches for cosmic strings and other topological defects
• The International Pulsar Timing Array second data release: Search for an isotropic Gravitational Wave Background
• On the evidence for a common-spectrum process in the search for the nanohertz gravitational-wave background with the Parkes Pulsar Timing Array
• Quantitative String Evolution
• New Sensitivity Curves for Gravitational-Wave Signals from Cosmological Phase Transitions
• Cosmological evolution of cosmic string loops
• Cosmic String Interpretation of NANOGrav Pulsar Timing Data
• Common-red-signal analysis with 24-yr high-precision timing of the European Pulsar Timing Array: Inferences in the stochastic gravitational-wave background search
• Probing the gravitational wave background from cosmic strings with LISA
• Extending the Velocity-dependent One-scale String Evolution Model
• A Non-Perturbative Analysis of the Finite T Phase Transition in SU(2)xU(1) Electroweak Theory
• Has NANOGrav found first evidence for cosmic strings?
• Large parallel cosmic string simulations: New results on loop production
• Stochastic gravitational wave background from smoothed cosmic string loops
• Constraints on cosmic strings using data from the third Advanced LIGO-Virgo observing run
• Numerical simulations of string networks in the Abelian-Higgs model
• Where the electroweak phase transition ends
• From NANOGrav to LIGO with metastable cosmic strings
• Probing the pre-BBN universe with gravitational waves from cosmic strings
• Beyond the Standard Models with Cosmic Strings
• Cosmic Vortons and Particle Physics Constraints
• Abelian Higgs Cosmic Strings: Small Scale Structure and Loops
• Scaling from gauge and scalar radiation in Abelian Higgs string networks
• Fingerprint of Low-Scale Leptogenesis in the Primordial Gravitational-Wave Spectrum
• Decay of Cosmic String Loops Due to Particle Radiation
• Chiral Vortons and Cosmological Constraints on Particle Physics
• What's new with the electroweak phase transition?
• Massive black hole binary systems and the NANOGrav 12.5 year results
• Field theory simulation of Abelian-Higgs cosmic string cusps
• BSM with Cosmic Strings: Heavy, up to EeV mass, Unstable Particles
• Search for the Gravitational-wave Background from Cosmic Strings with the Parkes Pulsar Timing Array Second Data Release
• Loop decay in Abelian-Higgs string networks
• Vorton Formation
• Searching for cosmic string induced stochastic gravitational wave background with the Parkes Pulsar Timing Array
• Vorton Existence and Stability
• Constraints on Superconducting Cosmic Strings from the Global $21$-cm Signal before Reionization
• Direct determination of cosmic string loop density from simulations
• Massive black holes at high redshifts from superconducting cosmic strings
• Emission of gravitational waves by superconducting cosmic strings
• Gravitational wave astronomy with LIGO and similar detectors in the next decade
• Generalised velocity-dependent one-scale model for current-carrying strings
• Cosmic string evolution with a conserved charge
• Microphysics of SO(10) Cosmic Strings
• Charge-velocity-dependent one-scale linear model
• Irreducible cosmic production of relic vortons
• Excited cosmic strings with superconducting currents
• Scaling solutions of wiggly cosmic strings
• Updated constraints on superconducting cosmic strings from the astronomy of fast radio bursts
• Vortex solutions in the presence of Dark Portals
• A possible origin of superconducting currents in cosmic strings

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• Cosmic Microwave Background anisotropies generated by cosmic strings with small-scale structure
• Cosmic Microwave Background Signatures from Current-carrying Cosmic Strings
• Primordial gravitational waves from spontaneous Lorentz symmetry breaking
• Dynamical simulations of colliding superconducting strings
• Imprints of an early matter-dominated era arising from dark matter dilution mechanism on cosmic string dynamics and gravitational wave signatures
• Effects of Nontrivial Topology on Neutron Star Rotation and its Potential Observational Implications
• Gravitational Wave Mountains: current-carrying domain walls
• London-like tensor modes of gravitational waves in cosmic string cosmology
• Accelerating Airy tensor modes of cosmological gravitational waves