# LIB2-208 — SL-05: DESI Feldman–Cousins neutrino-mass-sum upper bound

- class: COMPARATOR · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status NOT_PRINTED · attachment NOT_PRINTED · scorecard tier word none (PDF p.80)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The suite’s frequentist-constrained neutrino-mass-sum bound is 53 meV; the ledger records the Feldman–Cousins upper limit rather than a measured central value.

## Primary source

Paper 5, §2, Frequentist-constrained cosmology bound, PDF p.85: "the 53 meV frequentist-constrained bound is model tension, not exclusion."

## Machine

- url: /library-v2/LIB2-208/
- content_sha256: ce08772fe3f05d2dd3cc3ced7233894d21041a2e92b1614d89889a74a3f9ef9b
- candidate_ids: C2-183

## Freshness

- BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02
- Declared volatile fields (R36): BUILD_STAMP