Decay of the rho and a1 mesons on the lattice using distillation
Bibliographic record
Abstract
We extract the P-wave phase shift for five values of pion relative momenta, which gives information on the resonance.The Breit-Wigner formula describes the phase shift dependence nicely and we extract m = 792(7)(8) MeV and the coupling g = 5.13(20) at our m = 266 MeV.We extract the P-wave scattering length a l=1 = 0.082(10)(3) fm 3 from the state with the lowest pion relative momenta.We also determine the S-wave phase shift for two values of relative momenta, which provides parameters of the lowest axial resonance a 1 (1260).Using the Breit-Wigner fit we extract m a1 = 1.44(4)GeV and the coupling g a 1 = 1.1(3)GeV.From the lowest state we also extract the scattering length a l=0 = 0.23(12) fm for our m .The simulation is performed using one N f = 2 ensemble of gauge configurations with cloverimproved Wilson quarks.The phase shifts are determined from the lowest two energy-levels, which are obtained by the variational analysis with a number of quark-antiquark and mesonmeson interpolators.The correlation functions are calculated using the distillation method with the Laplacian Heaviside (LapH) smearing of quarks.
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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 | 0.001 | 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 | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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".