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- W3104187344 abstract "Sharp features in the primordial power spectrum are a powerful window into the inflationary epoch. To date, the cosmic microwave background (CMB) has offered the most sensitive avenue to search for these signatures. In this paper, we demonstrate the power of large-scale structure observations to surpass the CMB as a probe of primordial features. We show that the signatures in galaxy surveys can be separated from the broadband power spectrum and are as robust to the nonlinear evolution of matter as the standard baryon acoustic oscillations. As a result, analyses can exploit a significant range of scales beyond the linear regime available in the datasets. We develop a feature search for large-scale structure, apply it to the final data release of the Baryon Oscillation Spectroscopic Survey and find new bounds on oscillatory features that exceed the sensitivity of Planck for a significant range of frequencies. Moreover, we forecast that the next generation of galaxy surveys, such as DESI and Euclid, will be able to improve current constraints by up to an order of magnitude over an expanded frequency range." @default.
- W3104187344 created "2020-11-23" @default.
- W3104187344 creator A5017152776 @default.
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- W3104187344 creator A5047860911 @default.
- W3104187344 creator A5071903163 @default.
- W3104187344 creator A5080240971 @default.
- W3104187344 date "2019-12-27" @default.
- W3104187344 modified "2023-10-17" @default.
- W3104187344 title "Primordial features from linear to nonlinear scales" @default.
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