Search for Neutrinoless Double Beta Decay in Xenon 136 with the Enriched Xenon Observatory (EXO)
Bibliographic record
Abstract
resolved a puzzling mismatch between theory and a published limit [2]. Here we report on a search for neutrinoless double-beta decay of 136Xe with EXO-200 [3]. No signal is observed for a 136Xe exposure of 26.3 kg-yr, with a background of ∼ 1.5× 10−3 kg(enrLXe)−1yr−1keV−1 in the ±1σ region of interest. This sets a lower limit on the half-life of the neutrinoless double-beta decay T 0νββ 1/2 ( 136Xe) > 1.6 × 1025 yr (90% CL), corresponding to effective Majorana masses of
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".