Scalar-tensor theories of gravity, neutrino physics, and the H0 tension

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dc.contributor.authorBallardini, Mario
dc.contributor.authorBraglia, Matteo
dc.contributor.authorFinelli, Fabio
dc.date.accessioned2021-02-16T08:59:44Z
dc.date.available2021-02-16T08:59:44Z
dc.date.issued2020
dc.description.abstractWe use Planck 2018 data to constrain the simplest models of scalar-tensor theories characterized by a coupling to the Ricci scalar of the type F(σ)R with F(σ) = N2 pl + ξσ2 . We update our results with previous Planck and BAO data releases obtaining the tightest constraints to date on the coupling parameters, that is ξ < 5.5 × 10−4 for Npl = 0 (induced gravity or equivalently extended Jordan-Brans-Dicke) and (Npl √ 8πG) − 1 < 1.8 × 10−5 for ξ = −1/6 (conformal coupling), both at 95% CL. Because of a modified expansion history after radiation-matter equality compared to the ΛCDM model, all these dynamical models accommodate a higher value for H0 and therefore alleviate the tension between Planck/BAO and distance-ladder measurement from SNe Ia data from 4.4σ at best to 2.7-3.2σ with CMB alone and 3.5-3.6σ including BAO data.en_US
dc.identifier.citationBallardini, M. et al. (2020). Scalar-tensor theories of gravity, neutrino physics, and the H0 tension. Journal of Cosmology and Astroparticle Physics, 2020(10)en_US
dc.identifier.issn10.1088/1475-7516/2020/10/044
dc.identifier.urihttp://hdl.handle.net/10566/5938
dc.language.isoenen_US
dc.publisherIOP Publishingen_US
dc.subjectCosmological neutrinosen_US
dc.subjectCosmological parameters from CMBRen_US
dc.subjectModified gravityen_US
dc.subjectNeutrino masses from cosmologyen_US
dc.subjectScalar-tensoren_US
dc.titleScalar-tensor theories of gravity, neutrino physics, and the H0 tensionen_US
dc.typeArticleen_US

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