Multilepton signatures of a hidden sector in rare<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>decays
Bibliographic record
Abstract
We explore the sensitivity of flavor-changing $b\ensuremath{\rightarrow}s$ transitions to a (sub-) GeV hidden sector with generic couplings to the standard model through the Higgs, vector, and axion portals. The underlying two-body decays of $B$ mesons, $B\ensuremath{\rightarrow}{X}_{s}\mathcal{S}$, and ${B}^{0}\ensuremath{\rightarrow}\mathcal{S}\mathcal{S}$, where $\mathcal{S}$ denotes a generic new GeV-scale particle, may significantly enhance the yield of monochromatic lepton pairs in the final state via prompt $\mathcal{S}\ensuremath{\rightarrow}l\overline{l}$ decays. Existing measurements of the charged lepton spectrum in neutral-current semileptonic $B$ decays provide bounds on the parameters of the light sector that are significantly more stringent than the requirements of naturalness. New search modes, such as $B\ensuremath{\rightarrow}{X}_{s}+n(l\overline{l})$ and ${B}^{0}\ensuremath{\rightarrow}n(l\overline{l})$ with $n\ensuremath{\ge}2$, can provide additional sensitivity to scenarios in which both the Higgs and vector portals are active, and are accessible to (super-) $B$ factories and hadron colliders.
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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) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 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".