Lattice simulations find the bounce action for metastable cosmic string decay suppressed compared to thin-string estimates, implying faster decay.
From NANOGrav to LIGO with metastable cosmic strings
6 Pith papers cite this work. Polarity classification is still indexing.
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Metastable cosmic strings produce a gravitational wave background that is best modeled with three parameters (string tension Gμ plus independent time scales t_LB and t_NC), yielding a compact analytical spectrum when t_LB greatly exceeds t_NC.
Domain wall annihilation imprints a two-peaked spectrum on induced gravitational waves via an early matter-dominated phase and entropy dilution.
Precision study of dark sector phase transitions finds PTA-favored parameters near EFT breakdown with disfavored GW signals after higher-order corrections.
Thermal effects shift the PTA-compatible parameter region in a minimal dark-sector model to lower dark fine-structure constant and higher monopole-to-string-tension ratio by making thermally induced nucleation the dominant decay channel for metastable Z-strings.
Classical instabilities in metastable strings from two-step symmetry breaking can restrict the viable parameter space for explaining the PTA gravitational wave signal.
citing papers explorer
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The decay rate of metastable cosmic strings beyond the thin-string approximation
Lattice simulations find the bounce action for metastable cosmic string decay suppressed compared to thin-string estimates, implying faster decay.
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New gravitational-wave templates for metastable cosmic strings: Loop breaking versus network collapse
Metastable cosmic strings produce a gravitational wave background that is best modeled with three parameters (string tension Gμ plus independent time scales t_LB and t_NC), yielding a compact analytical spectrum when t_LB greatly exceeds t_NC.
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Imprint of domain wall annihilation on induced gravitational waves
Domain wall annihilation imprints a two-peaked spectrum on induced gravitational waves via an early matter-dominated phase and entropy dilution.
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A critical look at low-scale cosmological phase transitions in the PTA era
Precision study of dark sector phase transitions finds PTA-favored parameters near EFT breakdown with disfavored GW signals after higher-order corrections.
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Thermal Metastable Strings in One-Scale Models and Gravitational Waves
Thermal effects shift the PTA-compatible parameter region in a minimal dark-sector model to lower dark fine-structure constant and higher monopole-to-string-tension ratio by making thermally induced nucleation the dominant decay channel for metastable Z-strings.
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Metastable strings at PTAs: classical stability analysis
Classical instabilities in metastable strings from two-step symmetry breaking can restrict the viable parameter space for explaining the PTA gravitational wave signal.