$f(Q)$-gravity and neutrino physics

Abstract

Within the $f(Q)$-gravity framework we perform a phenomenological study of the cosmological observables in light of the degeneracy between neutrinos physics and the modified gravity parameter and we identify specific patterns which allow to break such degeneracy. We also provide separately constraints on the total mass of the neutrinos, $\Sigma m_{\nu }$, and on the effective number of neutrino species, $N_{\mathrm{eff}}$, using cosmic microwave background (CMB), baryon acoustic oscillation (BAO), redshift space distortion (RSD), supernovae (SNIa), galaxy clustering (GC) and weak gravitational lensing (WL) measurements. The strongest upper bound on the total mass of the neutrinos is found for the combination of CMB+BAO+RSD+SNIa and it is $\Sigma m_{\nu }<0.277$ eV at 95\% C.L. For the same combination of data we find $N_{\mathrm{eff}}=2.93_{-0.34}^{+0.31}$ at 95\% C.L. We also find that all combinations of data we consider, prefer a stronger gravitational interaction than $\Lambda$CDM. Finally, we consider the ${\chi }^2$ and deviance information criterion statistics and find the $f(Q)+\Sigma m_{\nu }$ model to be statistically supported by data over the standard scenario. On the contrary $f(Q)+N_{\mathrm{eff}}$ is supported by CMB+BAO+RSD+SNIa but a moderate evidence against it is found with GC and WL data.

11 pages; 5 figures; 4 tables, accepted for publication in PRD

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Cited by in corpus (11)

• Data reconstruction of the dynamical connection function in $f(Q)$ cosmology
• Testing $\Lambda$-Free f(Q) Cosmology
• Observational test for $f(Q)$ gravity with weak gravitational lensing
• Equivalence of $f(Q)$ cosmology with quintom-like scenario: the phantom field as effective realization of the non-trivial connection
• Phase-space analysis of the viscous fluid cosmological models in the coincident $f(Q)$ gravity
• Cosmological study of a symmetric teleparallel gravity model
• Relaxing cosmological constraints on current neutrino masses
• Cosmological dynamics of interacting dark energy and dark matter in $f(Q)$ gravity
• Neutrinos as possible probes for quantum gravity
• Viability of general relativity and modified gravity cosmologies using high-redshift cosmic probes
• Beyond the Cosmological Constant: Breaking the Geometric Degeneracy of $f(Q)$ cosmology via Redshift-Space Distortions