2-3 symmetry: Flavor changing<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi></mml:math>,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>τ</mml:mi></mml:math>decays, and neutrino mixing
Bibliographic record
Abstract
The observed pattern of neutrino mixing may be the result of a 2-3$(\ensuremath{\mu}\ensuremath{-}\ensuremath{\tau})$ symmetry in the leptonic sector. We consider a two Higgs doublet model with a 2-3 symmetry in the down-type quark and the charged lepton sector. The breaking of the 2-3 symmetry by the strange quark mass and the muon mass leads to flavor changing neutral currents in the quark sector and the charged lepton sector that are suppressed by ${m}_{s}/{m}_{b}$ and ${m}_{\ensuremath{\mu}}/{m}_{\ensuremath{\tau}}$ in addition to the mass of the heavy Higgs boson of the second Higgs doublet. A Higgs boson mass of ${m}_{H}\ensuremath{\sim}600--900\text{ }\text{ }\mathrm{GeV}$ can explain the deviation from the standard model reported in several rare $B$ decays. Predictions for other $B$ decays are made, and a new $CP$ phase is predicted in ${B}_{s}\ensuremath{-}{\overline{B}}_{s}$ mixing. The lepton flavor violating decays $\ensuremath{\tau}\ensuremath{\rightarrow}\ensuremath{\mu}\overline{l}(\overline{q})l(q)$ are below the experimental limits. The breaking of 2-3 symmetry in the lepton sector can lead to deviations of the atmospheric neutrino mixing angle from the maximal value by $\ensuremath{\sim}2$ degrees.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.038 | 0.009 |
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".