Substructure dependence of jet cross sections at HERA and determination of #alpha#_s
Bibliographic record
Abstract
Jet substructure and differential cross sections for jets produced in the\nphotoproduction and deep inelastic ep scattering regimes have been measured\nwith the ZEUS detector at HERA using an integrated luminosity of 82.2 pb-1. The\nsubstructure of jets has been studied in terms of the jet shape and subjet\nmultiplicity for jets with transverse energies Et(jet) > 17 GeV. The data are\nwell described by the QCD calculations. The jet shape and subjet multiplicity\nare used to tag gluon- and quark-initiated jets. Jet cross sections as\nfunctions of Et(jet), jet pseudorapidity, the jet-jet scattering angle, dijet\ninvariant mass and the fraction of the photon energy carried by the dijet\nsystem are presented for gluon- and quark-tagged jets. The data exhibit the\nbehaviour expected from the underlying parton dynamics. A value of alphas(Mz)\nof alphas(Mz) = 0.1176 +-0.0009(stat.) -0.0026 +0.0009 (exp.) -0.0072 +0.0091\n(th.) was extracted from the measurements of jet shapes in deep inelastic\nscattering.\n Comment: 67 pages, 17 figures, 24 tables
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".