Search for production of an<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Υ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1</mml:mn><mml:mi mathvariant="normal">S</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math>meson in association with a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math>or<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>boson using the full 1.96 TeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo accent="true" stretchy="false">¯</mml:mo></mml:mover></mml:math>collision data set at CDF
Bibliographic record
Abstract
Production of the $\mathrm{\ensuremath{\Upsilon}}(1\mathrm{S})$ meson in association with a vector boson is a rare process in the standard model with a cross section predicted to be below the sensitivity of the Tevatron. Observation of this process could signify contributions not described by the standard model or reveal limitations with the current nonrelativistic quantum-chromodynamic models used to calculate the cross section. We perform a search for this process using the full Run II data set collected by the CDF II detector corresponding to an integrated luminosity of $9.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The search considers the $\mathrm{\ensuremath{\Upsilon}}\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\mu}$ decay and the decay of the $W$ and $Z$ bosons into muons and electrons. In these purely leptonic decay channels, we observe one $\mathrm{\ensuremath{\Upsilon}}W$ candidate with an expected background of $1.2\ifmmode\pm\else\textpm\fi{}0.5$ events, and one $\mathrm{\ensuremath{\Upsilon}}Z$ candidate with an expected background of $0.1\ifmmode\pm\else\textpm\fi{}0.1$ events. Both observations are consistent with the predicted background contributions. The resulting upper limits on the cross section for $\mathrm{\ensuremath{\Upsilon}}+W/Z$ production are the most sensitive reported from a single experiment and place restrictions on potential contributions from non-standard-model physics.
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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 | 0.001 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.003 | 0.001 |
| Insufficient payload (model declined to judge) | 0.048 | 0.020 |
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".