# Impact of theoretical assumptions in the determination of the neutrino effective number from future CMB measurements

@article{Capparelli2017ImpactOT,
title={Impact of theoretical assumptions in the determination of the neutrino effective number from future CMB measurements},
author={L. M. Capparelli and Eleonora Di Valentino and Alessandro Melchiorri and Jens Chluba},
journal={Physical Review D},
year={2017},
volume={97},
pages={063519}
}
• Published 19 December 2017
• Physics
• Physical Review D
One of the major goals of future Cosmic Microwave Background measurements is the accurate determination of the effective number of neutrinos $N_{\rm eff}$. Reaching an experimental sensitivity of $\Delta N_{\rm eff} = 0.013$ could indeed falsify the presence of any non-standard relativistic particles at $95 \%$ c.l.. In this paper, we test how this future constraint can be affected by the removal of two common assumptions: a negligible running of the inflationary spectral index $n_{\rm run… 7 Citations ## Figures and Tables from this paper • Physics Monthly Notices of the Royal Astronomical Society • 2019 We consider a cosmological lepton asymmetry in the form of neutrinos and impose new expected sensitivities on such asymmetry through the degeneracy parameter ($\xi_{\nu}$) by using some future CMB • Physics Physical Review D • 2018 The precise measurements of Cosmic Microwave Background Anisotropy angular power spectra made by the Planck satellite show an anomalous value for the lensing amplitude, defined by the parameter In this thesis, I describe a number of recent important developments in neutrino cosmology on three fronts. Firstly, focusing on Large-Scale Structure (LSS) data, I will show that current • Physics • 2020 Models involving an interaction between the Dark Matter and the Dark Energy sectors have been proposed to alleviate the long standing Hubble constant tension. In this paper we analyze whether the • Physics Physical review letters • 2018 This work constructs representative particle physics models consistent with all experimental constraints and proposes a dark decay channel for the neutron, involving one or more dark sector particles in the final state that can be the dark matter. In Sect. 2.2, we have seen how the Universe on the largest observable scales is described by Einstein’s equations of General Relativity, the FLRW metric, and correspondingly the Friedmann equations, • Physics Physical Review D • 2018 Gravitational-wave standard sirens present a novel approach for the determination of the Hubble constant. After the recent spectacular confirmation of the method thanks to GW170817 and its optical ## References SHOWING 1-10 OF 39 REFERENCES • Materials Science • 2011 Combined analyses of recent cosmological data are showing interesting hints for the presence of an extra relativistic component, coined dark radiation. Here, we perform a new search for dark • Computer Science • 2016 The possibility of constraining$\beta_\mathrm{s}$with current and future measurements of CMB spectral distortions is discussed, showing that an experiment like PIXIE could provide strong constraints on$\alpha_{s}.
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