QCD sum rule study of hidden-charm pentaquarks
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Bibliographic record
Abstract
We study the mass spectra of hidden-charm pentaquarks having spin J = 1/2/3/2/5/2 and quark contents uudc (c) over bar. We systematically construct all the relevant local hidden-charm pentaquark currents, and we select some of them to perform QCD sum rule analyses. We find that the P-c(4380) and P-c(4450) can be identified as hidden-charm pentaquark states composed of an anti-charmed meson and a charmed baryon. Besides them, we also find (a) the lowest-lying hidden-charm pentaquark state of J(P) = 1/2(-) has the mass 4.33(-0.13)(+0.17) GeV, while the one of J(P) = 1/2(+) is significantly higher, that is, around 4.7-4.9GeV; (b) the lowest-lying hidden-charm pentaquark state of J(P) = 3/2(-) has the mass 4.37(-0.13)(+0.18) GeV, consistent with the P-c(4380) of J(P) = 3/2(-), while the one of J(P) = 3/2(+) is also significantly higher, that is, above 4.6GeV; (c) the hidden-charm pentaquark state of J(P) = 5/2(-) has a mass around 4.5-4.6GeV, slightly larger than the P-c(4450) of J(P) = 5/2(+).
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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 | 0.000 | 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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it