Pion form factor using domain wall valence and asqtad sea quarks
Bibliographic record
Abstract
We compute the pion electromagnetic form factor in a hybrid calculation with domain wall valence quarks and improved staggered (asqtad) sea quarks. This method can easily be extended to ρ→γπ transition form factors. The pion electromagnetic form factor is considered a good observable for studying the onset with increasing energy of the perturbative QCD regime for exclusive processes. As the pion is the lightest and simplest hadron, a perturbative description is believed to be valid at lower energy scales than predictions for heavier and more complicated hadrons like the nucleon [1]. A pseudoscalar particle has only a single electromagnetic form factor, F(Q 2), where Q 2 is the four-momentum transfer, and at Q 2 = 0, this form factor is the electric charge of the particle, F(Q 2 = 0) = 1; the magnetic form factor vanishes. The experimentally observed behavior of the form factor at small momentum transfer is well described by the vector meson dominance (VMD) hypothesis [2,3,4]
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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".