{
  "abstract": "We extend the Standard Model with an $A_4 \\times Z_4$ flavor symmetry and generalized CP (GCP) symmetry, realized through two flavon triplets that spontaneously break $A_4$ and generate the observed lepton mixing pattern. A new $A_4$-singlet flavon couples to one of these triplets through a complex quartic interaction that breaks GCP and fixes the reactor mixing angle; this same coupling biases the domain walls formed when that triplet breaks $A_4$. A global fit to oscillation data reproduces all mixing angles and mass splittings, predicting a maximal Dirac CP phase of $270^\\circ$ and an effective Majorana mass near $15\\text{ meV}$, testable by upcoming neutrinoless double-beta-decay ($0νββ$) experiments. The same coupling generates a stochastic gravitational-wave background peaking in the pulsar-timing-array and LISA bands, with peak frequency and amplitude predicted to scale as $\\sinθ_{13}$ and $\\sin^{-4}θ_{13}$, a falsifiable link between neutrino oscillation and gravitational-wave (GW) observations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.07661",
  "author_total": 2,
  "authors": [
    {
      "name": "Pulakesh Borah"
    },
    {
      "name": "Mrinal Kumar Das"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/askr1vv1w4xs9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.07661",
  "fulltext_url": null,
  "id": "askr1vv1w4xs9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.07661",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Neutrino Physics Research"
    ]
  ],
  "openalex": "W7212029563",
  "pdf_url": "https://arxiv.org/pdf/2609.07661",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/askr1vv1w4xs9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.07661",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.07661"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Gravitational Wave in an $A_4 \\otimes Z_4$ Neutrino Model with Generalised CP",
  "title_text": "Gravitational Wave in an A_4 ⊗ Z_4 Neutrino Model with Generalised CP",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/askr1vv1w4xs9",
  "venue": "arXiv",
  "versions": []
}