Measurement of the Decay Amplitudes of <i>B</i><sup>0</sup> → <i>J</i>/ψ<i>K</i><sup>*0</sup> and <i>B</i><sub>s</sub><sup>0</sup> → <i>J</i>/ψφ Decays
Bibliographic record
Abstract
An angular analysis of B0 → J/ψK*0and Bs0 → J/ψφ has been used to determine the decay amplitudes with parity-even longitudinal (A0) and transverse (A║) polarization and parity-odd transverse (A┴) polarization. The measurements are based on 190 B0 and 40Bs0candidates obtained from 89 pb-1 of p̅p collisions at the Fermilab Tevatron. The longitudinal decay amplitude dominates with |A0|2= 0.59 ± 0.06 ± 0.01 for B0 and |A0|2 = 0.61 ± 0.14 ± 0.02 for Bs0 decays. The parity-odd amplitude is found to be small with |A┴|2 =0.13-0.09+0.12 ±0.06 for B0 and|A┴|2= 0.23 ± 0.19 ± 0.04 for Bs0 decays.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.019 | 0.004 |
| Meta-epidemiology (narrow) | 0.023 | 0.023 |
| Meta-epidemiology (broad) | 0.022 | 0.016 |
| Bibliometrics | 0.011 | 0.018 |
| Science and technology studies | 0.014 | 0.014 |
| Scholarly communication | 0.009 | 0.012 |
| Open science | 0.024 | 0.011 |
| Research integrity | 0.011 | 0.013 |
| Insufficient payload (model declined to judge) | 0.015 | 0.009 |
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; both teacher heads agree on what is shown here.
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".