Year: 2025
Type: article
Abstract: We present a comprehensive analysis of the effects of models with very low reheating scenarios [T_{RH}∼O(MeV)] on the cosmological observables and derive corresponding bounds on the reheating temperature. With respect to previous work, our Letter includes a more precise computation of neutrino distribution functions, leveraging the latest datasets from cosmological surveys. We perform a joint analysis that combines constraints from big bang nucleosynthesis, the cosmic microwave background, and galaxy surveys, alongside separate investigations of these datasets, carefully assessing the impact of different choices of priors. At the 95% confidence level, we establish a lower bound on the reheating temperature of T_{RH}>5.96 MeV, representing the most stringent constraint to date.
Source: Physical Review Letters
DOI: 10.1103/j5rj-dz1k
Institutions: Istituto Nazionale di Fisica Nucleare, University of Ferrara, Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Consejo Superior de Investigaciones Científicas, Universitat de València, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Instituto de Física Corpuscular, University of Turin, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, University of Naples Federico II
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Ministerio de Ciencia, Innovación y Universidades, European Commission, Generalitat Valenciana, Agenzia Spaziale Italiana, Istituto Nazionale di Fisica Nucleare, Ministero dell'Università e della Ricerca, European Research Council, Instituto Nazionale di Fisica Nucleare, Agencia Estatal de Investigación, European Social Fund, NextGenerationEU
OpenAlex ID: W4415682918