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, Σ m_{ν} , and on the effective number of neutrino species, N_{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 Σ m_{ν}<0.277 eV at 95% C.L. For the same combination of data we find N_{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 Λ CDM . Finally, we consider the χ^{2} and deviance information criterion statistics and find the f (Q )+Σ m_{ν} model to be statistically supported by data over the standard scenario. On the contrary f (Q )+N_{eff} is supported by CMB +BAO +RSD +SNIa but a moderate evidence against it is found with GC and WL data.
 Publication:

Physical Review D
 Pub Date:
 June 2023
 DOI:
 10.1103/PhysRevD.107.124048
 arXiv:
 arXiv:2306.03015
 Bibcode:
 2023PhRvD.107l4048A
 Keywords:

 Astrophysics  Cosmology and Nongalactic Astrophysics;
 General Relativity and Quantum Cosmology
 EPrint:
 11 pages