Measurement of<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:msubsup><mml:mi>D</mml:mi><mml:mi>s</mml:mi><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy="false">)</mml:mo><mml:mo>+</mml:mo></mml:mrow></mml:msubsup><mml:msubsup><mml:mi>D</mml:mi><mml:mi>s</mml:mi><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy="false">)</mml:mo><mml:mo>−</mml:mo></mml:mrow></mml:msubsup></mml:math>Branching Ratios
Bibliographic record
Abstract
The decays ${B}_{s}^{0}\ensuremath{\rightarrow}{D}_{s}^{(*)+}{D}_{s}^{(*)\ensuremath{-}}$ are reconstructed in a data sample corresponding to an integrated luminosity of $6.8\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the CDF II detector at the Tevatron $p\overline{p}$ collider. All decay modes are observed with a significance of more than $10\ensuremath{\sigma}$, and we measure the ${B}_{s}^{0}$ production rate times ${B}_{s}^{0}\ensuremath{\rightarrow}{D}_{s}^{(*)+}{D}_{s}^{(*)\ensuremath{-}}$ branching ratios relative to the normalization mode ${B}^{0}\ensuremath{\rightarrow}{D}_{s}^{+}{D}^{\ensuremath{-}}$to be $0.183\ifmmode\pm\else\textpm\fi{}0.021\ifmmode\pm\else\textpm\fi{}0.017$ for ${B}_{s}^{0}\ensuremath{\rightarrow}{D}_{s}^{+}{D}_{s}^{\ensuremath{-}}$, $0.424\ifmmode\pm\else\textpm\fi{}0.046\ifmmode\pm\else\textpm\fi{}0.035$ for ${B}_{s}^{0}\ensuremath{\rightarrow}{D}_{s}^{*\ifmmode\pm\else\textpm\fi{}}{D}_{s}^{\ensuremath{\mp}}$, $0.654\ifmmode\pm\else\textpm\fi{}0.072\ifmmode\pm\else\textpm\fi{}0.065$ for ${B}_{s}^{0}\ensuremath{\rightarrow}{D}_{s}^{*+}{D}_{s}^{*\ensuremath{-}}$, and $1.261\ifmmode\pm\else\textpm\fi{}0.095\ifmmode\pm\else\textpm\fi{}0.112$ for the inclusive decay ${B}_{s}^{0}\ensuremath{\rightarrow}{D}_{s}^{(*)+}{D}_{s}^{(*)\ensuremath{-}}$, where the uncertainties are statistical and systematic. These results are the most precise single measurements to date and provide important constraints for indirect searches for nonstandard model physics in ${B}_{s}^{0}$ mixing.
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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 | 0.012 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.005 | 0.005 |
| Open science | 0.003 | 0.003 |
| Research integrity | 0.002 | 0.003 |
| Insufficient payload (model declined to judge) | 0.151 | 0.113 |
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".