Search for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>4430</mml:mn><mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mo>−</mml:mo></mml:msup></mml:math>at<i>BABAR</i>
Bibliographic record
Abstract
We report the results of a search for Z(4430)− decay to J/ψπ− or ψ(2S)π− in B−,0→J/ψπ−K0,+ and B−,0→ψ(2S)π−K0,+ decays. The data were collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e+e− collider operating at center-of-mass energy 10.58 GeV, and the sample corresponds to an integrated luminosity of 413 fb−1. Each Kπ− mass distribution exhibits clear K∗(892) and K∗2(1430) signals, and the efficiency-corrected spectrum is well described by a superposition of the associated Breit-Wigner intensity distributions, together with an S-wave contribution obtained from the LASS I=1/2 Kπ− scattering amplitude measurements. Each Kπ− angular distribution varies significantly in structure with Kπ− mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/ψπ− or ψ(2S)π− mass distribution is well described by the reflection of the measured Kπ− mass and angular distribution structures. We see no significant evidence for a Z(4430)− signal for any of the processes investigated, neither in the total J/ψπ− or ψ(2S)π− mass distribution, nor in the corresponding distributions for the regions of Kπ− mass for which observation of the Z(4430)− signal was reported. We obtain branching-fraction upper limits B(B−→Z−K⎯⎯⎯0,Z−→J/ψπ−)<1.5×10−5, B(B0→Z−K+,Z−→J/ψπ−)<0.4×10−5, B(B−→Z−K⎯⎯⎯0,Z−→ψ(2S)π−)<4.7×10−5, and B(B0→Z−K+,Z−→ψ(2S)π−)<3.1×10−5 at 95% confidence level, where the Z(4430)− mass and width have been fixed to the reported central values.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".