Twisted echoes of an odd quartet: Scalar-induced gravitational waves as a probe of primordial parity-violation

arXiv:2507.02733 · astro-ph.CO, gr-qc, hep-th · Submitted 2025-07-03 · Read on arXiv

astro-ph.CO, gr-qc, hep-th

Submitted: 2025-07-03

Updated: 2026-09-23

Comments: v1: 8 pages, 2 figures; v2: 9 pages, 2 figures, published version, title in journal publication is 'Scalar-induced gravitational waves as a probe of primordial parity-violation'

Journal ref: Phys. Rev. D 114, 063535 (2026)

DOI: 10.1103/fptz-nm8k

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Bispectrum — 10× in this paper · explained in 3 episodes
• Non-Gaussianity — 3× in this paper · explained in 2 episodes
• Homogeneity — 2× in this paper · explained in 2 episodes
• Primordial non-Gaussianity — 2× in this paper · explained in 2 episodes

Sources

• General Relativistic Dynamics of Irrotational Dust: Cosmological Implications
• The stochastic gravitational-wave background produced by non-linear cosmological perturbations
• Relativistic second-order perturbations of the Einstein-de Sitter Universe
• The cosmological gravitational wave background from primordial density perturbations
• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• The Maximal Amount of Gravitational Waves in the Curvaton Scenario
• Gravitational waves from inflation
• Semianalytic Calculation of Gravitational Wave Spectrum Nonlinearly Induced from Primordial Curvature Perturbations
• Scalar induced gravitational waves review
• The NANOGrav 15-year Data Set: Search for Signals from New Physics
• Limits on scalar-induced gravitational waves from the stochastic background by pulsar timing array observations
• The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities
• Probing scalar induced gravitational waves with PTA and LISA: The Importance of third order correction
• New constraints on primordial non-Gaussianity from missing two-loop contributions of scalar induced gravitational waves
• Complete analysis of the background and anisotropies of scalar-induced gravitational waves: primordial non-Gaussianity $f_{\mathrm{NL}}$ and $g_{\mathrm{NL}}$ considered
• Induced Gravitational Waves from Ultra Slow-Roll Inflation and Pulsar Timing Arrays Observations
• Constraints on Non-Gaussian primordial curvature perturbation from the LIGO-Virgo-KAGRA third observing run
• Model-independent reconstruction of the primordial curvature power spectrum from PTA data
• Constraining the history of reheating with the NANOGrav 15-year data
• Constraints on the inflaton potential from scalar-induced gravitational waves and primordial black holes

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