How do mirror charge radii constrain density dependence of the symmetry energy?
Bibliographic record
Abstract
skin Symmetry energy Isospin-symmetry breaking It has recently been suggested that differences in the charge radii of mirror nuclei (Δ𝑅 mirr ch ) are strongly correlated with the neutron-skin thickness (𝑅 skin ) of neutron-rich nuclei and with the slope of the symmetry energy (𝐿).To test this assumption, we present ab initio calculations of 𝑅 skin in 48 Ca and 208 Pb, Δ𝑅 mirr ch in 36 Ca-36 S, 38 Ca-38 Ar, 41 Sc-41 Ca, 48 Ni-48 Ca, 52 Ni-52 Cr, and 54 Ni-54 Fe mirror pairs, and 𝐿.Employing the recently developed 34 chiralinteraction samples, identified by the history matching approach, we conduct rigorous statistical analysis of correlations among Δ𝑅 mirr ch , 𝑅 skin and 𝐿, accounting for quantified uncertainties from low-energy constants of chiral interaction, chiral effective field theory truncation and many-body method approximation.The ab initio results reveal an appreciable Δ𝑅 mirr ch -𝐿 correlation in 𝑓 𝑝-shell mirror pairs.However, contrary to previous studies, the present calculation finds that the studied 𝑠𝑑-shell mirror pairs do not exhibit any Δ𝑅 mirr ch -𝐿 correlation.
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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 | 0.001 | 0.006 |
| 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 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".