Observation of inclusive<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mrow><mml:mo>*</mml:mo><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:math>production in the decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">Υ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1</mml:mn><mml:mi>S</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math>
Bibliographic record
Abstract
We present a study of the inclusive ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ production in the decay of $\mathit{\ensuremath{\Upsilon}}(1S)$ using $(98.6\ifmmode\pm\else\textpm\fi{}0.9)\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\mathit{\ensuremath{\Upsilon}}(2S)$ mesons collected with the BABAR detector at the $\mathit{\ensuremath{\Upsilon}}(2S)$ resonance. Using the decay chain $\mathit{\ensuremath{\Upsilon}}(2S)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\mathit{\ensuremath{\Upsilon}}(1S)$, $\mathit{\ensuremath{\Upsilon}}(1S)\ensuremath{\rightarrow}{D}^{*\ifmmode\pm\else\textpm\fi{}}X$, where $X$ is unobserved, we measure the branching fraction $\mathcal{B}[\mathit{\ensuremath{\Upsilon}}(1S)\ensuremath{\rightarrow}{D}^{*\ifmmode\pm\else\textpm\fi{}}X]=(2.52\ifmmode\pm\else\textpm\fi{}0.13(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.15(\mathrm{syst}))%$ and the ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ momentum distribution in the rest frame of the $\mathit{\ensuremath{\Upsilon}}(1S)$. We find evidence for an excess of ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ production over the expected rate from the virtual photon annihilation process $\mathit{\ensuremath{\Upsilon}}(1S)\ensuremath{\rightarrow}{\ensuremath{\gamma}}^{*}\ensuremath{\rightarrow}c\overline{c}\ensuremath{\rightarrow}{D}^{*\ifmmode\pm\else\textpm\fi{}}X$.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.003 | 0.002 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.017 | 0.002 |
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".