Proton Compton Scattering from Linearly Polarized Gamma Rays
Bibliographic record
Abstract
Differential cross sections for Compton scattering from the proton have been measured at scattering angles of 55\ifmmode^\circ\else\textdegree\fi{}, 90\ifmmode^\circ\else\textdegree\fi{}, and 125\ifmmode^\circ\else\textdegree\fi{} in the laboratory frame using quasimonoenergetic linearly (circularly) polarized photon beams with a weighted mean energy value of 83.4 MeV (81.3 MeV). These measurements were performed at the High Intensity Gamma-Ray Source facility at the Triangle Universities Nuclear Laboratory. The results are compared to previous measurements and are interpreted in the chiral effective field theory framework to extract the electromagnetic dipole polarizabilities of the proton, which gives ${\ensuremath{\alpha}}_{E1}^{p}=13.8\ifmmode\pm\else\textpm\fi{}1.{2}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}0.{1}_{\mathrm{BSR}}\ifmmode\pm\else\textpm\fi{}0.{3}_{\mathrm{theo}},{\ensuremath{\beta}}_{M1}^{p}=0.2\ensuremath{\mp}1.{2}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}0.{1}_{\mathrm{BSR}}\ensuremath{\mp}0.{3}_{\mathrm{theo}}$ in units of ${10}^{\ensuremath{-}4}\text{ }\text{ }{\mathrm{fm}}^{3}$.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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".