Explaining the CMS Higgs flavor-violating decay excess
Bibliographic record
Abstract
Direct searches for lepton flavor-violating Higgs boson decays in the $\ensuremath{\tau}\ensuremath{\mu}$ channel have recently been reported by the CMS Collaboration. The results display a slight excess of signal events with a significance of $2.5\ensuremath{\sigma}$, which translates into a branching ratio of about 1%. By interpreting these findings as a hint for beyond the standard model physics, we show that the Type-III 2HDM is capable of reproducing such a signal while at the same time satisfying from below boundedness of the scalar potential, perturbativity, electroweak precision data, measured Higgs standard decay modes, and low-energy lepton flavor-violating constraints. We have found that the allowed signal strength ranges for the $b\overline{b}$, $W{W}^{*}$, and $Z{Z}^{*}$ standard channels shrink as soon as $\mathrm{BR}(h\ensuremath{\rightarrow}\ensuremath{\tau}\ensuremath{\mu})\ensuremath{\sim}1%$ is enforced. Thus, we point out that if the excess persists, improved measurements of these channels may be used to test our Type-III 2HDM scenario.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 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".