Measurement of the inclusive isolated prompt photon cross-section in proton-proton collisions at âs = 8 TeV with the ATLAS detector
Bibliographic record
Abstract
Differential cross-section measurements of the inclusive production of isolated prompt photons in proton-proton collisions at a centre-of-mass energy √s = 8 TeV are presented. The measurements cover the pseudorapidity regions |η| < 1.37 and 1.56 ≤ |η| < 2.37 in the photon transverse energy range 25 GeV < E{T}^γ < 1500 GeV. Results are based on a data sample corresponding to an integrated luminosity of 20.2 fb⁻¹, collected with the ATLAS detector at the Large Hadron Collider in 2012. Photon candidates are identified by combining information from the ATLAS calorimeters and inner tracker. The signal yield is measured using a data-driven technique. The measured differential cross-section values are compared to leading order and next-to-leading order perturbative QCD calculations and found to be in good agreement over ten orders of magnitude.
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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 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".