Run RV1,0 · L3→L2 attribution
BICEP2 2014
19 June 2014
- 1 · Claim tested
- BICEP2 Collaboration (2014): published lensed-ΛCDM+tensor fit with r≈0.20, including the constitutive dust/foreground caveat.
- 2 · Run date / Evidence state
- 19 June 2014. Evidence/practice is frozen at the PRL publication date; later BICEP2-field-specific Planck 353-GHz dust information and the joint cross-frequency evidence do not enter this run.
- 3 · Verdict
- OPEN
- 4 · Why
- One deduplicated foreground-discrimination deficit remains: A3 Stability fails, A5 Carrier Adequacy remains OPEN, and the L3→L2 attribution bridge is not discharged because the practice-enabled multi-frequency/dust-sensitive closing path was unrealized at tR; Coverage is established, but CertR/ObsR are not.
- 5 · What this does not mean
- OPEN does not mean the measured B-mode excess was false, that dust was already proven, or that the tensor interpretation was retrospectively refuted; it records unresolved attribution at the 19 June 2014 state.
- 6 · What would trigger a new run?
- BICEP2-field-specific 353-GHz dust information, later joint cross-frequency evidence, or a reformulated claim creates a new run; none may rewrite RV1,0.
