Analysis of the decay [pi] --> [rho][nu]
Bibliographic record
Abstract
An analysis of the decay r -* pvhas been undertaken in the OPAL experiment at CERN, in Geneva, Switzerland.From the 1990 experimental run of the LEP particle accelerator, a sample of 3310 e+e r+r events was selected, with an estimated contamination of 1.9%.Requirements were applied to select a subsample of r * decays, resulting in 650 decays being found.From studies with simulated data, the non-p contamination in this sample was estimated to be approximately 22%, and the p selection efficiency to be approximately 33%.The Branching fraction for the decay is measured to be B(r -* pvr) = 0.234 + 0.009(stat.)+3g(syst.)The mean r polarisation at the peak of the Zresonance is measured to be F,.-0.17+0.10(stat.)+0.08(syst.).From the r polarisation we extract a measurement of the electroweak mixing sin 2 0 w = 0.225 + 0.015.The r polarisation asymmetry at the peak of the Zresonance is also measured, A, = -0.09+ 0.13 + 0.05.From the polarisation measurement, VT/ar = 0.09 + 0.06, and from the polarisation asymmetry Ve/ac = 0.06 + 0.10.Combined with previous LEP measurements of the r polarisation, the electroweak mixing is found to be sin 2 0 w = 0.2308 + 0.0042.Combined with measurements from other experiments, one obtains sin 2 0 w = 0.2303 + 0.0013.
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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) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".