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Detection Prospects of Gravitational Waves from SU(2) Axion Inflation

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arxiv 2406.11742 v2 pith:VJAX7A5X submitted 2024-06-17 astro-ph.CO gr-qchep-ph

Charles Badger , Hannah Duval , Tomohiro Fujita , Sachiko Kuroyanagi , Alba Romero-Rodríguez , Mairi Sakellariadou This is my paper · ORCID
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keywords backgroundconstraintsdetectioninflationprospectsaxiondatafields
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We study detection prospects of a gravitational-wave background (GWB) sourced by SU(2) gauge fields considering all possible observational constraints. More precisely, we consider bounds set by cosmic microwave background measurements, primordial black hole overproduction, as well as backreaction of the gauge fields on the background evolution. Gravitational-waves data from the first three observing runs of the LIGO-Virgo-KAGRA Collaboration show no evidence for a GWB contribution from axion inflation. However, we are able to place conservative constraints on the parameters of the SU(2) inflation with current data. We investigate conditions on the inflationary potential that would lead to a detectable signal that evades astrophysical and cosmological constraints and discuss detection prospects for third generation networks.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Kinetic Gauge Friction in Natural Inflation

    astro-ph.CO 2024-11 conditional novelty 7.0 of 10

    Kinetic gauge friction can sustain natural inflation with sub-Planckian f, and a Chern-Simons term stabilizes the perturbations, yielding CMB-compatible spectra.

  2. Oscillations and parity violation in gravitational wave background from extra tensor modes

    astro-ph.CO 2025-08 conditional novelty 5.0 of 10

    Linear mixing between metric and extra spin-2 tensor modes during inflation produces oscillatory and chiral gravitational wave backgrounds with features that future detectors could identify.

  3. A battle of designs: triangular vs. L-shaped detectors and parity violation in the gravitational-wave background

    gr-qc 2025-11 conditional novelty 4.0 of 10

    L-shaped Einstein Telescope designs outperform triangular designs for detecting a parity-violating gravitational-wave background, and ET alone cannot do it under current observational constraints.

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