☆ 4.7 Article

Constraints on neutrino-dark matter interactions from cosmic microwave background and large scale structure data

PHYSICAL REVIEW D (2010)

期刊

PHYSICAL REVIEW D

卷 81, 期 4, 页码 -

出版社

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevD.81.043507

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Astronomy & Astrophysics Physics, Particles & Fields

资金

NSF [AST-0605427]
LANL [IGPP-08-505]

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Reagent

摘要

We update a previous investigation of cosmological effects of a nonstandard interaction between neutrinos and dark matter. Parametrizing the elastic-scattering cross section between the two species as a function of the temperature of the Universe, the resulting neutrino-dark matter fluid has a nonzero pressure, which determines diffusion-damped oscillations in the matter power spectrum similar to the acoustic oscillations generated by the photon-baryon fluid. Using cosmic microwave background data in combination with large scale structure experiment results, we then put constraints on the fraction of the interacting dark matter component as well as on the corresponding opacity.

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Health checkup test of the standard cosmological model in view of recent cosmic microwave background anisotropies experiments

Eleonora Di Valentino, William Giare, Alessandro Melchiorri, Joseph Silk

Summary: This study compares the cosmic microwave background temperature anisotropies and polarization angular power spectra observed by different experiments. The results show anomalies in the CMB spectra that are not consistent with the standard cosmological model, indicating potential systematic biases or limitations in the current understanding of the universe. It is suggested that future high-precision CMB measurements are needed for a definitive answer.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Testing the ΛCDM paradigm with growth rate data and machine learning

Ruben Arjona, Alessandro Melchiorri, Savvas Nesseris

Summary: This article proposes a method for cosmological consistency test using future survey data, by analyzing the growth of matter perturbation data to assess the accuracy of different cosmological models. By reconstructing these models using genetic algorithms, the results show that our test method is able to rule out multiple cosmological models and helps to check for tensions in the data and alleviate the existing tension of matter fluctuations.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2022)

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Article Astronomy & Astrophysics

Cosmological constraints on slow roll inflation: An update

Matteo Forconi, William Giare, Eleonora Di Valentino, Alessandro Melchiorri

Summary: Based on the latest cosmological observations, new constraints on slow roll inflation in different extended scenarios beyond the ΛCDM cosmological model have been provided. Differences in datasets can remarkably change the compatibility among different inflationary models.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Unfinished fabric of the three neutrino paradigm

Francesco Capozzi, Eleonora Di Valentino, Eligio Lisi, Antonio Marrone, Alessandro Melchiorri, Antonio Palazzo

Summary: The current third paradigm involves oscillation and non-oscillation data analysis of neutrinos, constraining parameters such as mixing angles, CP-violating phase, and mass differences, highlighting the concordance or discordance among different constraints. Measurements consistently show hints of normal mass ordering and specific ranges for certain parameters, with tensions among different datasets.

PHYSICAL REVIEW D (2021)

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