Determination of the strong phase in D-0 -> K+pi(-) using quantum-correlated measurements
Bibliographic record
Abstract
We exploit the quantum coherence between pair-produced D-0 and (D) over bar (0) in psi(3770) decays to study charm mixing, which is characterized by the parameters x and y, and to make a first determination of the relative strong phase delta between D-0 -> K+pi(-) and (D) over bar (0)-> K+pi(-). Using 281 pb(-1) of e(+)e(-) collision data collected with the CLEO-c detector at E-cm=3.77 GeV, as well as branching fraction input and time-integrated measurements of R-M equivalent to(x(2)+y(2))/2 and R-WS equivalent to Gamma(D-0 -> K+pi(-))/Gamma((D) over bar (0)-> K+pi(-)) from other experiments, we find cos delta=1.03(-0.17)(+0.31) +/- 0.06, where the uncertainties are statistical and systematic, respectively. By further including other mixing parameter measurements, we obtain an alternate measurement of cos delta=1.10 +/- 0.35 +/- 0.07, as well as xsin delta=(4.4(-1.8)(+2.7) +/- 2.9) x 10(-3) and delta=(22(-12-11)(+11+9))degrees.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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".