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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".