Parity-violating inelastic electron-proton scattering at low <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math> above the resonance region
Bibliographic record
Abstract
We report the measurement of the parity-violating asymmetry for the inelastic scattering of electrons from the proton, at ${Q}^{2}=0.082\phantom{\rule{4pt}{0ex}}{\mathrm{GeV}}^{2}$ and $W=2.23$ GeV, above the resonance region. The result ${A}_{\mathrm{Inel}}=\ensuremath{-}13.5\ifmmode\pm\else\textpm\fi{}2.0(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}3.9(\mathrm{syst})$ ppm agrees with theoretical calculations, and helps to validate the modeling of the $\ensuremath{\gamma}Z$ interference structure functions ${F}_{1}^{\ensuremath{\gamma}Z}$ and ${F}_{2}^{\ensuremath{\gamma}Z}$ used in those calculations, which are also used for determination of the two-boson exchange $\ensuremath{\gamma}\text{\ensuremath{-}}Z$ box diagram (${\ensuremath{\square}}_{\ensuremath{\gamma}Z}$) contribution to parity-violating elastic scattering measurements. A positive parity-violating asymmetry for inclusive ${\ensuremath{\pi}}^{\ensuremath{-}}$ production was observed, as well as positive beam-normal single-spin asymmetry for scattered electrons and a negative beam-normal single-spin asymmetry for inclusive ${\ensuremath{\pi}}^{\ensuremath{-}}$ production.
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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 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 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".