{
  "abstract": "We investigate the effective axial $U_A(1)$ symmetry restoration at finite temperature in an external magnetic field using meson screening masses, as well as meson susceptibilities, in a $(2+1)$-flavor Nambu-Jona-Lasinio (NJL) model. To incorporate inverse magnetic catalysis, we employ a magnetic-field-dependent four-quark coupling constrained by the lattice QCD chiral pseudo-critical temperature, with the 't Hooft coupling fixed. In the lattice-improved NJL model, the longitudinal screening mass difference between the $U_A(1)$ partners $δ^0$ and $π^0$ and their normalized meson susceptibility difference exhibit axial magnetic catalysis at low temperatures and axial inverse magnetic catalysis near the chiral crossover, whereas the transverse screening mass difference increases with $eB$ at all temperatures. Despite these different responses, the axial pseudo-critical temperatures extracted from the thermal inflection points of these three alternative order parameters decrease with $eB$, implying that a decreasing pseudo-critical temperature can coexist with an increasing transverse screening mass difference at fixed temperature.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.35468",
  "author_total": 5,
  "authors": [
    {
      "name": "Bing-Kai Sheng"
    },
    {
      "name": "Zigeng Ding"
    },
    {
      "name": "Danning Li"
    },
    {
      "name": "Xinyang Wang"
    },
    {
      "name": "Lang Yu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cx9h2jys6f7be.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.35468",
  "fulltext_url": null,
  "id": "cx9h2jys6f7be",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.35468",
  "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",
      "hep-ph"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|High-Energy Particle Collisions Research"
    ]
  ],
  "openalex": "W7214787165",
  "pdf_url": "https://arxiv.org/pdf/2609.35468",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cx9h2jys6f7be.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.35468",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.35468"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Exploring $U_A(1)$ symmetry restoration in a magnetic field by meson screening masses in the NJL model",
  "title_text": "Exploring U_A(1) symmetry restoration in a magnetic field by meson screening masses in the NJL model",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/cx9h2jys6f7be",
  "venue": "arXiv",
  "versions": []
}