{
  "abstract": "We investigate an inflationary scenario within a modified gravity theory that extends the Einstein-Hilbert action through a non-minimal coupling between the inflaton $ϕ$ and the trace of the energy-momentum tensor $T$. This $f(ϕ)T$ framework is designed to naturally recover the standard general relativity in the post-inflationary universe. Within this theory, we apply the Woods-Saxon potential. The slow-roll dynamics yields a luminal sound speed $c_s^2=1$ for our specific choice of the coupling function. For the model parameters $a \\lesssim 1$ and the modest coupling $β=0.1$, we obtain a scalar spectral index $n_s\\approx0.959$--$0.966$ and a tensor-to-scalar ratio $r<0.01$, which reveal a good agreement with the latest Planck and BICEP/Keck data on the $(n_s, r)$ constraints. Crucially, we shall demonstrate that the $f(ϕ)T$ coupling is essential for the observational viability of the model with respect to the CMB two-point statistics. This work establishes a viable inflationary scenario within the scope of the inflationary observables which are considered here.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: New Astronomy 130 (2027) 102656",
  "arxiv": "2609.22933",
  "author_total": 3,
  "authors": [
    {
      "name": "Feyzollah Younesizadeh"
    },
    {
      "name": "Davoud Kamani"
    },
    {
      "name": "Younes Younesizadeh"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/91xbm20x0j1e5.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.22933",
  "fulltext_url": null,
  "id": "91xbm20x0j1e5",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.22933",
  "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",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.22933",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/91xbm20x0j1e5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.22933",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.22933"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Modified Gravity Framework for the Woods-Saxon Inflation: Theoretical Foundations and Observational Constraints",
  "title_text": "Modified Gravity Framework for the Woods-Saxon Inflation: Theoretical Foundations and Observational Constraints",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/91xbm20x0j1e5",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1016/j.newast.2026.102656",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}