Spectroscopic study of a possible <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>n</mml:mi><mml:mi>n</mml:mi></mml:mrow></mml:math> resonance and a pair of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">Σ</mml:mi><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:math> states using the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mo>(</mml:mo><mml:mi>e</mml:mi><mml:mo>,</mml:mo><mml:msup><mml:mi>e</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>)</mml:mo></mml:mrow></mml:math> reaction with a tritium target
Bibliographic record
Abstract
A mass spectroscopy experiment with a pair of nearly identical high-resolution spectrometers and a tritium target was performed in Hall A at Jefferson Lab. Utilizing the $(e,{e}^{\ensuremath{'}}{K}^{+})$ reaction, enhancements, which may correspond to a possible $\mathrm{\ensuremath{\Lambda}}nn$ resonance and a pair of $\mathrm{\ensuremath{\Sigma}}NN$ states, were observed with an energy resolution of about 1.21 MeV ($\ensuremath{\sigma}$), although greater statistics are needed to make definitive identifications. An experimentally measured $\mathrm{\ensuremath{\Lambda}}nn$ state may provide a unique constraint in determining the $\mathrm{\ensuremath{\Lambda}}n$ interaction, for which no scattering data exist. In addition, although bound $A=3$ and 4 $\mathrm{\ensuremath{\Sigma}}$ hypernuclei have been predicted, only an $A=4 \mathrm{\ensuremath{\Sigma}}$ hypernucleus ($_{\mathrm{\ensuremath{\Sigma}}}^{4}\mathrm{He}$) was found, utilizing the $({K}^{\ensuremath{-}},{\ensuremath{\pi}}^{\ensuremath{-}})$ reaction on a $^{4}\mathrm{He}$ target. The possible bound $\mathrm{\ensuremath{\Sigma}}NN$ state is likely a ${\mathrm{\ensuremath{\Sigma}}}^{0}nn$ state, although this has to be confirmed by future experiments.
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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 | 0.009 | 0.006 |
| Meta-epidemiology (narrow) | 0.005 | 0.009 |
| Meta-epidemiology (broad) | 0.002 | 0.009 |
| Bibliometrics | 0.003 | 0.007 |
| Science and technology studies | 0.010 | 0.009 |
| Scholarly communication | 0.007 | 0.007 |
| Open science | 0.011 | 0.012 |
| Research integrity | 0.007 | 0.010 |
| Insufficient payload (model declined to judge) | 0.165 | 0.007 |
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; both teacher heads agree on what is shown here.
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".