Measurements of the Angular Distributions in the Decays<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>at CDF
Bibliographic record
Abstract
We report an indirect search for nonstandard model physics using the flavor-changing neutral current decays $B\ensuremath{\rightarrow}{K}^{(*)}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$. We reconstruct the decays and measure their angular distributions, as a function of ${q}^{2}={M}_{\ensuremath{\mu}\ensuremath{\mu}}^{2}{c}^{2}$, where ${M}_{\ensuremath{\mu}\ensuremath{\mu}}$ is the dimuon mass, in $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ using a data sample corresponding to an integrated luminosity of $6.8\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The transverse polarization asymmetry ${A}_{T}^{(2)}$ and the time-reversal-odd charge-and-parity asymmetry ${A}_{\mathrm{im}}$ are measured for the first time, together with the ${K}^{*}$ longitudinal polarization fraction ${F}_{L}$ and the muon forward-backward asymmetry ${A}_{\mathrm{FB}}$ for the decays ${B}^{0}\ensuremath{\rightarrow}{K}^{*0}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ and ${B}^{+}\ensuremath{\rightarrow}{K}^{*+}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$. The $B\ensuremath{\rightarrow}{K}^{*}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ forward-backward asymmetry in the most sensitive kinematic regime, $1\ensuremath{\le}{q}^{2}<6\text{ }\text{ }{\mathrm{GeV}}^{2}/{c}^{2}$, is measured to be ${A}_{\mathrm{FB}}={0.29}_{\ensuremath{-}0.23}^{+0.20}(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.07(\mathrm{syst})$, the most precise result to date. No deviations from the standard model predictions are observed.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.013 | 0.004 |
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".