{"paper":{"title":"Constraints on the sum of the neutrino masses in dynamical dark energy models with $w(z) \\geq -1$ are tighter than those obtained in $\\Lambda$CDM","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Ariel Goobar, Katherine Freese, Martina Gerbino, Olga Mena, Suhail Dhawan, Sunny Vagnozzi","submitted_at":"2018-01-25T19:00:46Z","abstract_excerpt":"We explore cosmological constraints on the sum of the three active neutrino masses $M_{\\nu}$ in the context of dynamical dark energy (DDE) models with equation of state (EoS) parametrized as a function of redshift $z$ by $w(z)=w_0+w_a\\,z/(1+z)$, and satisfying $w(z)\\geq-1$ for all $z$. We perform a Bayesian analysis and show that, within these models, the bounds on $M_{\\nu}$ \\textit{do not degrade} with respect to those obtained in the $\\Lambda$CDM case; in fact the bounds are slightly tighter, despite the enlarged parameter space. We explain our results based on the observation that, for fixe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.08553","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}