Searching for new physics with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>b</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mo>→</mml:mo><mml:mover accent="true"><mml:mi>s</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo>→</mml:mo><mml:msub><mml:mi>V</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:msub><mml:mi>V</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>penguin decays
Bibliographic record
Abstract
We present the most general (six-helicity) angular analysis of ${B}_{s}^{0}\ensuremath{\rightarrow}{V}_{1}(\ensuremath{\rightarrow}{P}_{1}{P}_{1}^{\ensuremath{'}}){V}_{2}(\ensuremath{\rightarrow}{P}_{2}{P}_{2}^{\ensuremath{'}})$ (${V}_{i}$ is a vector meson, and ${P}_{i}$, ${P}_{i}^{\ensuremath{'}}$ are pseudoscalars). We focus on final states accessible to both ${B}_{s}^{0}$ and ${\overline{B}}_{s}^{0}$-these are mainly $\overline{b}\ensuremath{\rightarrow}\overline{s}$ penguin decays. We also derive the most general decay amplitude, and discuss the differences between it and that used by LHCb in its analysis of ${B}_{s}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}\ensuremath{\phi}$. In the standard model, all $CP$ violation is predicted to be small, so that the simple measurement of a sizeable $CP$-violating observable indicates the presence of new physics. A full fit to the data is not necessary. By determining which of the $CP$-violating observables are nonzero, one can learn about the structure of the underlying new physics. Finally, we apply the angular analysis to ${B}_{s}^{0}\ensuremath{\rightarrow}{K}^{*0}{\overline{K}}^{*0}$, and show that there are numerous $CP$-violating observables that remain in the untagged data sample.
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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 | 0.002 | 0.007 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.002 | 0.004 |
| Bibliometrics | 0.005 | 0.006 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.010 | 0.013 |
| Open science | 0.003 | 0.006 |
| Research integrity | 0.004 | 0.005 |
| Insufficient payload (model declined to judge) | 0.649 | 0.477 |
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".