No evidence for cosmological parity violation is found in the first kurto-spectrum analysis of BOSS DR12 and DESI DR1 luminous red galaxies.
Inflationary magnetogenesis with added helicity: constraints from non-gaussianities
3 Pith papers cite this work. Polarity classification is still indexing.
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abstract
In previous work, two of us have proposed a model of inflationary magnetogenesis based on a rolling auxiliary field able both to account for the magnetic fields inferred by the (non) observation of gamma-rays from blazars, and to start the galactic dynamo, without incurring in any strong coupling or strong backreaction regime. Here we evaluate the correction to the scalar spectrum and bispectrum with respect to single-field slow-roll inflation generated in that scenario. The strongest constraints on the model originate from the non-observation of a scalar bispectrum. Nevertheless, even when those constraints are taken into consideration, the scenario can successfully account for the observed magnetic fields as long as the energy scale of inflation is smaller than $10^6\div10^8$~GeV, under some conditions on the slow roll of the auxiliary scalar field.
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background 3representative citing papers
Spectral features imprinted by long-lived BSM particles on any primordial GWB directly determine the particles' mass and decay rate once the model and initial abundance are specified.
Inflationary magnetic fields induce curvature perturbations that form ultralight PBHs, generating a stochastic GW background with model-specific features.
citing papers explorer
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Testing parity with composite-field spectra of BOSS and DESI luminous red galaxies
No evidence for cosmological parity violation is found in the first kurto-spectrum analysis of BOSS DR12 and DESI DR1 luminous red galaxies.
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Irreducible Gravitational Wave Background as a Particle Detector
Spectral features imprinted by long-lived BSM particles on any primordial GWB directly determine the particles' mass and decay rate once the model and initial abundance are specified.
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The Magnetic Origin of Primordial Black Holes: Ultralight PBHs and Secondary GWs
Inflationary magnetic fields induce curvature perturbations that form ultralight PBHs, generating a stochastic GW background with model-specific features.