Tensor Interaction Limit Derived From the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi><mml:mtext mathvariant="normal">−</mml:mtext><mml:mi>β</mml:mi><mml:mtext mathvariant="normal">−</mml:mtext><mml:mover accent="true"><mml:mi>ν</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>Correlation in Trapped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Li</mml:mi><mml:mprescripts/><mml:none/><mml:mn>8</mml:mn></mml:mmultiscripts></mml:math>Ions
Bibliographic record
Abstract
A measurement of the $\ensuremath{\alpha}\mathrm{\text{\ensuremath{-}}}\ensuremath{\beta}\mathrm{\text{\ensuremath{-}}}\overline{\ensuremath{\nu}}$ angular correlation in the Gamow-Teller decay $^{8}\mathrm{Li}\ensuremath{\rightarrow}^{8}\mathrm{Be}^{*}+\overline{\ensuremath{\nu}}+\ensuremath{\beta}$, $^{8}\mathrm{Be}^{*}\ensuremath{\rightarrow}\ensuremath{\alpha}+\ensuremath{\alpha}$ has been performed using ions confined in a linear Paul trap surrounded by silicon detectors. The energy difference spectrum of the $\ensuremath{\alpha}$ particles emitted along and opposite the direction of the $\ensuremath{\beta}$ particle is consistent with the standard model prediction and places a limit of 3.1% (95.5% confidence level) on any tensor contribution to the decay. From this result, the amplitude of any tensor component ${C}_{T}$ relative to that of the dominant axial-vector component ${C}_{A}$ of the electroweak interaction is limited to $|{C}_{T}/{C}_{A}|<0.18$ (95.5% confidence level). This experimental approach is facilitated by several favorable features of the $^{8}\mathrm{Li}$ $\ensuremath{\beta}$ decay and has different systematic effects than the previous $\ensuremath{\beta}\mathrm{\text{\ensuremath{-}}}\overline{\ensuremath{\nu}}$ correlation results for a pure Gamow-Teller transition obtained from studying $^{6}\mathrm{He}$ $\ensuremath{\beta}$ decay.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.005 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.003 | 0.001 |
| Science and technology studies | 0.003 | 0.003 |
| Scholarly communication | 0.005 | 0.007 |
| Open science | 0.003 | 0.003 |
| Research integrity | 0.002 | 0.005 |
| Insufficient payload (model declined to judge) | 0.067 | 0.019 |
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".