DESI DR1 Lyman-alpha data yields Δ²★=0.379±0.032 and n★=-2.309±0.019 at k★=0.009 km⁻¹s and z=3, sharpening N_eff, α_s, and β_s constraints by factors of 1.18-1.90 when combined with other probes.
CBR Anisotropy and the Running of the Scalar Spectral Index
5 Pith papers cite this work, alongside 271 external citations. Polarity classification is still indexing.
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271
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abstract
Accurate ($\lesssim 1\% $) predictions for the anisotropy of the Cosmic Background Radiation (CBR) are essential for using future high-resolution ($\lesssim 1^\circ$) CBR maps to test cosmological models. In many inflationary models the variation (``running'') of the spectral index of the spectrum of density perturbations is a significant effect and leads to changes of around 1\% to 10\% in the CBR power spectrum. We propose a general method for taking running into account which uses the derivative of the spectral index ($dn/d\ln k$). Conversely, high-resolution CBR maps may be able to determine $dn/d\ln k$, giving important information about the inflationary potential.
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Cosmological analysis of the DESI DR1 Lyman alpha 1D power spectrum
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Constraining primordial oscillations and inflationary particle production with Planck, ACT DR6, and DESI DR2
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The DESI Experiment Part I: Science,Targeting, and Survey Design
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The landscape of QCD axion models
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