Measurement of inclusive<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>production in the charged-current interactions of neutrinos in a 1.3-GeV wide band beam
Bibliographic record
Abstract
In this paper, we report on the measurement of the rate of inclusive ${\ensuremath{\pi}}^{0}$ production induced by charged-current neutrino interactions in a ${\mathrm{C}}_{8}{\mathrm{H}}_{8}$ target at a mean energy of 1.3 GeV in the K2K near detector. Out of a sample of 11 606 charged-current neutrino interactions, we select 479 ${\ensuremath{\pi}}^{0}$ events with two reconstructed photons. We find that the cross section for the inclusive ${\ensuremath{\pi}}^{0}$ production relative to the charged-current quasielastic cross section is $\frac{{\ensuremath{\sigma}}_{\mathrm{CC}{\ensuremath{\pi}}^{0}}}{{\ensuremath{\sigma}}_{\mathrm{CCQE}}}=0.426\ifmmode\pm\else\textpm\fi{}0.032\text{ }(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.035\text{ }(\mathrm{syst})$. The energy-dependent cross section ratio is also measured. The results are consistent with previous experiments for exclusive channels on different targets.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 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".