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Status: Unchecked ×Keyword: neutrino mass hierarchy ×Clear all

2 claims from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   Measuring neutrino mass in light of ACT DR6 and DESI DR2

   Feng, Li, Du, Zhang and Zhang · Physics of the Dark Universe · 2026

   The paper updates limits on total neutrino mass and its ordering in four dark energy models, using ACT DR6 CMB, DESI DR2 BAO and DESY5 data, and finds the limits depend on the dark energy behaviour.

   Unchecked2 claims
   Show 2 claims

   1. Unchecked“Specifically, models exhibiting early-time quintessence features (e.g., HDE) yield the most stringent constraints, whereas those allowing for early-time phantom behavior (e.g., $w_0w_a$CDM) result in significantly looser bounds.”
   2. UncheckedAcross all models tested, the inverted neutrino mass ordering gives weaker limits on total neutrino mass and the degenerate ordering gives the tightest.“Despite these model-dependent variations, we observe a robust hierarchy dependence across all scenarios, where the inverted hierarchy consistently yields weaker constraints and the degenerate hierarchy consistently yields tightest constraints.”