Bibliographic record
Abstract
We calculate the properties of excited charm and charm-strange mesons. We use the relativized quark model to calculate their masses and wave functions that are used to calculate radiative transition partial widths and the ${^{3}P}_{0}$ quark-pair-creation model to calculate their strong decay widths. We use these results to make quark model spectroscopic assignments for recently observed charm and charm-strange mesons. In particular, we find that the properties of the ${D}_{J}(2550{)}^{0}$ and ${D}_{J}^{*}(2600{)}^{0}$ are consistent with those of the $2{^{1}S}_{0}(c\overline{u})$ and the $2{^{3}S}_{1}(c\overline{u})$ states respectively, and the ${D}_{1}^{*}(2760{)}^{0}$, ${D}_{3}^{*}(2760{)}^{\ensuremath{-}}$, and ${D}_{J}(2750{)}^{0}$ with those of the $1{^{3}D}_{1}(c\overline{u})$, $1{^{3}D}_{3}(d\overline{c})$, and $1{D}_{2}(c\overline{u})$ states respectively. We tentatively identify the ${D}_{J}^{*}(3000{)}^{0}$ as the $1{^{3}F}_{4}(c\overline{u})$ and favor the ${D}_{J}(3000{)}^{0}$ to be the $3{^{1}S}_{0}(c\overline{u})$ although we do not rule out the $1{F}_{3}$ and $1{F}_{3}^{\ensuremath{'}}$ assignment. For the recently observed charm-strange mesons we identify the ${D}_{s1}^{*}(2709{)}^{\ifmmode\pm\else\textpm\fi{}}$, ${D}_{s1}^{*}(2860{)}^{\ensuremath{-}}$, and ${D}_{s3}^{*}(2860{)}^{\ensuremath{-}}$ as the $2{^{3}S}_{1}(c\overline{s})$, $1{^{3}D}_{1}(s\overline{c})$, and $1{^{3}D}_{3}(s\overline{c})$ states respectively and suggest that the ${D}_{sJ}(3044{)}^{\ifmmode\pm\else\textpm\fi{}}$ is most likely the ${D}_{s1}(2{P}_{1}^{\ensuremath{'}})$ or ${D}_{s1}(2{P}_{1})$ state although it might be the ${D}_{s2}^{*}(2{^{3}P}_{2})$ with the $DK$ final state too small to be observed with current statistics. Based on the predicted properties of excited states, that they do not have too large a total width and that they have a reasonable branching ratio to simple final states, we suggest states that should be able to be found in the near future. We expect that the tables of properties summarizing our results will be useful for interpreting future observations of charm and charm-strange mesons.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".