Constraining neutrino properties and smoothing the Hubble tension via the LSBR model

• Published in: General relativity and gravitation 2023, Vol.55 (1), Article 22
• Main Authors: Dahmani, Safae, Bouali, Amine, El Bojaddaini, Imad, Errahmani, Ahmed, Ouali, Taoufik
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Classical and Quantum Gravitation; Dark energy; Differential Geometry; Gravity; Mathematical and Computational Physics; Mathematical models; Neutrinos; Parameters; Physics; Physics and Astronomy; Quantum Physics; Relativity Theory; Theoretical
• ISSN: 0001-7701; 1572-9532
• DOI: 10.1007/s10714-023-03066-y

In this paper, we study phantom dark energy (DE) effects on cosmological parameters by considering the different properties of neutrinos. The Little Sibling of the Big Rip (LSBR), which is the phantom DE model under consideration in the current paper induces an abrupt event in the future and deviates from the Λ CDM model by an additional constant parameter. We study different neutrino properties, namely the standard active neutrinos with N eff = 3.044 , the standard massive neutrinos, and possible sterile neutrinos with varying N eff . In the case of standard neutrinos, a slight increase in the H 0 parameter is observed in the LSBR model compared to the Λ CDM model. In the case of massive neutrinos, we notice that LSBR cannot reduce the upper limits on the sum of the neutrino masses but it can increase the value of H 0 . Furthermore, in the case of relativistic neutrinos, we obtain H 0 = 70.4 ± 0.78 km s - 1 Mpc - 1 for LSBR model, which reduces the H 0 tension to 2.03 σ .