{
  "abstract": "We explore the parameter space of the pvCD-Bonn B potential within the relativistic Brueckner--Hartree--Fock framework under the constraints from the empirical saturation properties of symmetric nuclear matter. We first examine the effects of the scalar-meson and pion coupling constants. Changing the $σ$-meson couplings in the $^{1}S_0$ and $^{3}S_1$--$^{3}D_1$ channels alone cannot reproduce the empirical saturation density and binding energy at the same time, whereas increasing $g_π$ moves the saturation point toward the empirical region. However, changing $g_π$ alone also affects the deuteron properties and tensor-sensitive observables. We therefore extend the parameter search by varying the $ρ$-meson tensor coupling $f_ρ/g_ρ$ and readjusting the effective $σ$-meson couplings in the $^{1}S_0$ and $^{3}P_0$ channels. Four representative parameter sets with $g_π^2/4π=14.7$--15.0 give deuteron properties close to the experimental values and maintain a reasonable description of the main neutron--proton phase shifts and differential cross sections at $E_{\\rm lab}=50$ and 212 MeV. Their saturation densities lie in the range $0.159$--$0.161~\\mathrm{fm}^{-3}$, with saturation energies between $-15.00$ and $-15.38~\\mathrm{MeV}$. For the interactions obtained by varying $g_π$, the neutron-star mass--radius relations show only a weak dependence on the pion coupling, with maximum masses of about $2.24$--$2.28\\,M_\\odot$ and radii of about $12.3$--$12.6~\\mathrm{km}$ at $1.4\\,M_\\odot$. These results show that including the $ρ$-meson tensor coupling and partial-wave-dependent $σ$-meson couplings provides a better balance between free-space two-nucleon observables and nuclear-matter saturation properties than varying the pion coupling alone.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.29801",
  "author_total": 5,
  "authors": [
    {
      "name": "Ke Nan"
    },
    {
      "name": "Chencan Wang"
    },
    {
      "name": "Jinniu Hu"
    },
    {
      "name": "Ying Zhang"
    },
    {
      "name": "Hong Shen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d8eyvttwhqsfb.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.29801",
  "fulltext_url": null,
  "id": "d8eyvttwhqsfb",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.29801",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "nucl-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.29801",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d8eyvttwhqsfb.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.29801",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.29801"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Exploring the Parameter Space of pvCD-Bonn Potentials under Constraints from Nuclear Saturation Properties",
  "title_text": "Exploring the Parameter Space of pvCD-Bonn Potentials under Constraints from Nuclear Saturation Properties",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/d8eyvttwhqsfb",
  "venue": "arXiv",
  "versions": []
}