Correlating <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>A</mml:mi> <mml:mo stretchy="false">→</mml:mo> <mml:mi>γ</mml:mi> <mml:mi>γ</mml:mi> </mml:math> with electric dipole moments in the two Higgs doublet model in light of the diphoton excesses at 95 GeV and 152 GeV
Bibliographic record
Abstract
We examine the correlations between new scalar boson decays to photons and electric dipole moments (EDMs) in the C P -violating flavor-aligned two-Higgs-doublet model (2HDM). It is convenient to work in the Higgs basis { H 1 , H 2 } where only the first Higgs doublet field H 1 acquires a vacuum expectation value. In light of the LHC Higgs data, which agree well with Standard Model (SM) predictions, it follows that the parameters of the 2HDM are consistent with the Higgs alignment limit. In this parameter regime, the observed SM-like Higgs boson resides almost entirely in H 1 , and the other two physical neutral scalars, which reside almost entirely in H 2 , are approximate eigenstates of C P (denoted by the C P -even H and the C P -odd A ). In the Higgs basis, the scalar potential term Z ¯ 7 H 1 † H 2 H 2 † H 2 + H . c . governs the charged-Higgs loop contributions to the decay of H and A to photons. If Re Z ¯ 7 Im Z ¯ 7 ≠ 0 , then C P -violating effects are present and allow for an H + H − A coupling, which can yield a sizable branching ratio for A → γ γ . These C P -violating effects also generate nonzero EDMs for the electron, the neutron and the proton. We examine these correlations for the cases of m A = 95 GeV and m A = 152 GeV where interesting excesses in the diphoton spectrum have been observed at the LHC. These excesses can be explained via the decay of A while being consistent with the experimental bound for the electron EDM in regions of parameter space that can be tested with future neutron and proton EDM measurements. This allows for the interesting possibility where the 95 GeV diphoton excess can be identified with A , while m H ≃ 98
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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 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.046 | 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".