Zobrazeno 1 - 10
of 158
pro vyhledávání: '"Philcox, Oliver H E"'
Primordial gravitational waves could be non-Gaussian, just like primordial scalar perturbations. Although the tensor two-point function has thus-far remained elusive, the three-point function could, in principle, be large enough to be detected in Cos
Externí odkaz:
http://arxiv.org/abs/2409.10595
Massive particles produced during inflation impact soft limits of primordial correlators. Searching for these signatures presents an exciting opportunity to uncover the particle spectrum in the inflationary epoch. We present non-perturbative methods
Externí odkaz:
http://arxiv.org/abs/2407.08731
Whilst current observational evidence favors a close-to-Gaussian spectrum of primordial perturbations, there exist many models of the early Universe that predict this distribution to have exponentially enhanced or suppressed tails. In this work, we g
Externí odkaz:
http://arxiv.org/abs/2406.15546
Suppression without Thawing: Constraining Structure Formation and Dark Energy with Galaxy Clustering
We present a new perturbative full-shape analysis of BOSS galaxy clustering data, including the full combination of the galaxy power spectrum and bispectrum multipoles, baryon acoustic oscillations, and cross-correlations with the gravitational lensi
Externí odkaz:
http://arxiv.org/abs/2406.13388
Non-adiabatic production of massive particles is a generic feature of many inflationary mechanisms. If sufficiently massive, these particles can leave features in the cosmic microwave background (CMB) that are not well-captured by traditional correla
Externí odkaz:
http://arxiv.org/abs/2405.03738
Autor:
Collaboration, Beyond-2pt, Krause, Elisabeth, Kobayashi, Yosuke, Salcedo, Andrés N., Ivanov, Mikhail M., Abel, Tom, Akitsu, Kazuyuki, Angulo, Raul E., Cabass, Giovanni, Contarini, Sofia, Cuesta-Lazaro, Carolina, Hahn, ChangHoon, Hamaus, Nico, Jeong, Donghui, Modi, Chirag, Nguyen, Nhat-Minh, Nishimichi, Takahiro, Paillas, Enrique, Ibañez, Marcos Pellejero, Philcox, Oliver H. E., Pisani, Alice, Schmidt, Fabian, Tanaka, Satoshi, Verza, Giovanni, Yuan, Sihan, Zennaro, Matteo
The last few years have seen the emergence of a wide array of novel techniques for analyzing high-precision data from upcoming galaxy surveys, which aim to extend the statistical analysis of galaxy clustering data beyond the linear regime and the can
Externí odkaz:
http://arxiv.org/abs/2405.02252
Autor:
Philcox, Oliver H. E., Flöss, Thomas
By measuring, modeling and interpreting cosmological datasets, one can place strong constraints on models of the Universe. Central to this effort are summary statistics such as power spectra and bispectra, which condense the high-dimensional dataset
Externí odkaz:
http://arxiv.org/abs/2404.07249
Autor:
Cabass, Giovanni, Philcox, Oliver H. E., Ivanov, Mikhail M., Akitsu, Kazuyuki, Chen, Shi-Fan, Simonović, Marko, Zaldarriaga, Matias
Massive particles leave imprints on primordial non-Gaussianity via couplings to the inflaton, even despite their exponential dilution during inflation: practically, the Universe acts as a Cosmological Collider. We present the first dedicated search f
Externí odkaz:
http://arxiv.org/abs/2404.01894
Autor:
de Belsunce, Roger, Philcox, Oliver H. E., Irsic, Vid, McDonald, Patrick, Guy, Julien, Palanque-Delabrouille, Nathalie
Publikováno v:
MNRAS 533, 3756-3770 (2024)
We measure the three-dimensional power spectrum (P3D) of the transmitted flux in the Lyman-a (Ly-a) forest using the complete extended Baryon Oscillation Spectroscopic Survey data release 16 (eBOSS DR16). This sample consists of 205,012 quasar spectr
Externí odkaz:
http://arxiv.org/abs/2403.08241
Many inflationary theories predict a non-Gaussian spectrum of primordial tensor perturbations, sourced from non-standard vacuum fluctuations, modified general relativity or new particles such as gauge fields. Several such models also predict a chiral
Externí odkaz:
http://arxiv.org/abs/2312.12498