Measurement of the Generalized Forward Spin Polarizabilities of the Neutron
Bibliographic record
Abstract
The generalized forward spin polarizabilities ${\ensuremath{\gamma}}_{0}$ and ${\ensuremath{\delta}}_{LT}$ of the neutron have been extracted for the first time in a ${Q}^{2}$ range from 0.1 to $0.9\text{ }\text{ }{\mathrm{G}\mathrm{e}\mathrm{V}}^{2}$. Since ${\ensuremath{\gamma}}_{0}$ is sensitive to nucleon resonances and ${\ensuremath{\delta}}_{LT}$ is insensitive to the $\ensuremath{\Delta}$ resonance, it is expected that the pair of forward spin polarizabilities should provide benchmark tests of the current understanding of the chiral dynamics of QCD. The new results on ${\ensuremath{\delta}}_{LT}$ show significant disagreement with chiral perturbation theory calculations, while the data for ${\ensuremath{\gamma}}_{0}$ at low ${Q}^{2}$ are in good agreement with a next-to-leading-order relativistic baryon chiral perturbation theory calculation. The data show good agreement with the phenomenological MAID model.
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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".