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Bibliographic record
Abstract
We search for the ${Z}_{1}(4050{)}^{+}$ and ${Z}_{2}(4250{)}^{+}$ states, reported by the Belle Collaboration, decaying to ${\ensuremath{\chi}}_{c1}{\ensuremath{\pi}}^{+}$ in the decays ${\overline{B}}^{0}\ensuremath{\rightarrow}{\ensuremath{\chi}}_{c1}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ and ${B}^{+}\ensuremath{\rightarrow}{\ensuremath{\chi}}_{c1}{K}_{S}^{0}{\ensuremath{\pi}}^{+}$ where ${\ensuremath{\chi}}_{c1}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\gamma}$. The data were collected with the BABAR detector at the SLAC PEP-II asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider operating at center-of-mass energy 10.58 GeV, and correspond to an integrated luminosity of $429\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. In this analysis, we model the background-subtracted, efficiency-corrected ${\ensuremath{\chi}}_{c1}{\ensuremath{\pi}}^{+}$ mass distribution using the $K\ensuremath{\pi}$ mass distribution and the corresponding normalized $K\ensuremath{\pi}$ Legendre-polynomial moments, and then test the need for the inclusion of resonant structures in the description of the ${\ensuremath{\chi}}_{c1}{\ensuremath{\pi}}^{+}$ mass distribution. No evidence is found for the ${Z}_{1}(4050{)}^{+}$ and ${Z}_{2}(4250{)}^{+}$ resonances, and 90% confidence level upper limits on the branching fractions are reported for the corresponding $B$-meson decay modes.
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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 | 0.007 |
| Meta-epidemiology (narrow) | 0.003 | 0.002 |
| Meta-epidemiology (broad) | 0.002 | 0.003 |
| Bibliometrics | 0.006 | 0.008 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.005 | 0.008 |
| Open science | 0.004 | 0.005 |
| Research integrity | 0.005 | 0.003 |
| Insufficient payload (model declined to judge) | 0.621 | 0.662 |
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".