# T_DM_NULL — result

**Run:** 2026-05-05T13:44:13Z
**Recipe SHA-256:** `bfa1bbda05ebdc8851eeefa210db1710d8fa71faeede1b021a5c330c53c2138c`

## Tracker

| Experiment | Limit (cm²) | m_χ (GeV) | log₁₀(canonical / limit) | Consistent with DCT (σ_SI=0)? |
|---|---|---|---|---|
| LZ Phase 1 (2023) | 9.20e-48 | 36 | +2.04 | YES |
| XENONnT (2023) | 2.58e-47 | 28 | +1.59 | YES |
| PandaX-4T (2023) | 3.30e-47 | 40 | +1.48 | YES |

DAMA/LIBRA: claimed 13-sigma annual modulation; status: contested, excluded by xenon experiments. Treated as not-confirmed.

**Classification:** **NEUTRAL_EXTENDING_AGREEMENT**.

## Interpretation

DCT predicts sigma_SI = 0 exactly. The three flagship xenon-target direct-detection experiments (LZ, XENONnT, PandaX-4T) all report null at 90% CL. The strongest exclusion (LZ 2023, 9.2e-48 cm^2) is 100x below the canonical MSSM neutralino expectation, ruling out wide swaths of WIMP parameter space. DCT remains consistent. The DAMA/LIBRA annual modulation claim is contested and excluded by the xenon experiments using the same target. A future positive WIMP detection at >5 sigma at any direct-detection experiment would falsify the DCT dark-sector treatment.

## Caveat

- This is an anti-prediction class: DCT cannot generate a positive
  1919-class detection in this channel. Continued nulls extend the
  agreement; a positive detection would clearly falsify.
- A non-WIMP dark-matter candidate (axion, sterile neutrino) detected
  via a non-WIMP channel would also be inconsistent with DCT's
  no-particle-DM stance.