Constraints on massive neutrinos in a non-standard PPS scenario

Abstract : In this work we present cosmological bounds on three active neutrino masses and on steriles neutrino species in an extended cosmological scenario in which the primordial power spectrum of scalar perturbations differs from the usual power-law shape predicted by the simplest inflationary models. The power spectrum is instead modeled by means of a piecewise cubic Hermite interpolating polynomial (PCHIP). Our analyses consider different cosmological data sets combined with the new full Planck mission data, which include polarization measurements. When using Cosmic Microwave Background (CMB) measurements the constraints on massive neutrinos are degrades, while the addition of a prior on the Hubble constant and of the Barion Acoustic Oscillation (BAO) data displace the bound to lower values in agreement with the standard power-law PPS case. Moreover there is no preference fore a non-zero active and sterile neutrino masses if a scenario with ΔNeff massive steriles neutrino species is also considered.
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Communication dans un congrès
14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 3, pp.2120-2124, 2017, 〈10.1142/9789813226609_0235〉
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https://hal.archives-ouvertes.fr/hal-01669850
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Soumis le : jeudi 21 décembre 2017 - 01:10:47
Dernière modification le : mercredi 19 septembre 2018 - 01:38:24

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Elena Giusarma, Martina Gerbino, Alessandro Melchiorri, Eleonora Di Valentino, Stefano Gariazzo, et al.. Constraints on massive neutrinos in a non-standard PPS scenario. 14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 3, pp.2120-2124, 2017, 〈10.1142/9789813226609_0235〉. 〈hal-01669850〉

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