{
  "abstract": "We investigated the $\\bar{K}$-nucleus interaction through the simultaneous measurement of the inclusive $^{12}{\\rm C}(K^-, p)$ and exclusive $K^-$-escape $^{12}{\\rm C}(K^-, p K^-_{esc})$ reactions at $1.8$ GeV/$c$ at J-PARC. The present measurement explicitly focuses on the $K^-$ escape process for the first time, successfully accomplishing a direct experimental determination of the imaginary part of the $K^-$ optical potential. The differential cross section for the $K^-$-escape reaction was determined to be $436 \\pm 6\\:(\\text{stat.}) \\pm 44\\:(\\text{syst.})~μ\\text{b/sr}$. A simultaneous likelihood fit yielded real and imaginary potential strengths of $V_0 = -72\\:^{+3}_{-5}\\:(\\text{stat.})\\:^{+0}_{-8}\\:(\\text{syst.})~\\text{MeV}$ and $W_0 = -100\\:^{+7}_{-1}\\:(\\text{stat.})\\:^{+0}_{-16}\\:(\\text{syst.})~\\text{MeV}$ at the nuclear center, respectively. The derived $W_0$ is significantly stronger than that predicted by theoretical models based on one-nucleon processes, suggesting possible contribution of multi-nucleon involving processes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. Lett. 137, 132501 (2026)",
  "arxiv": "2606.18398",
  "author_total": 35,
  "authors": [
    {
      "name": "Fumiya Oura"
    },
    {
      "name": "Yudai Ichikawa"
    },
    {
      "name": "Junko Yamagata-Sekihara"
    },
    {
      "name": "Jung Keun Ahn"
    },
    {
      "name": "Sung Wook Choi"
    },
    {
      "name": "Manami Fujita"
    },
    {
      "name": "Takeshi Harada"
    },
    {
      "name": "Shoichi Hasegawa"
    },
    {
      "name": "Shuhei Hayakawa"
    },
    {
      "name": "Kenneth Hicks"
    },
    {
      "name": "Satoru Hirenzaki"
    },
    {
      "name": "Sang Hoon Hwang"
    },
    {
      "name": "Kenichi Imai"
    },
    {
      "name": "Yuji Ishikawa"
    },
    {
      "name": "Woo Seung Jung"
    },
    {
      "name": "Shunsuke Kajikawa"
    },
    {
      "name": "Kento Kamada"
    },
    {
      "name": "Byung Min Kang"
    },
    {
      "name": "Shin Hyung Kim"
    },
    {
      "name": "Tomomasa Kitaoka"
    },
    {
      "name": "Jaeyong Lee"
    },
    {
      "name": "Jong Won Lee"
    },
    {
      "name": "Koji Miwa"
    },
    {
      "name": "Taito Morino"
    },
    {
      "name": "Tamao Sakao"
    },
    {
      "name": "Hiroyuki Sako"
    },
    {
      "name": "Masayoshi Saito"
    },
    {
      "name": "Susumu Sato"
    },
    {
      "name": "Toshiyuki Takahashi"
    },
    {
      "name": "Kiyoshi Tanida"
    },
    {
      "name": "Hirokazu Tamura"
    },
    {
      "name": "Mifuyu Ukai"
    },
    {
      "name": "Shunsuke Wada"
    },
    {
      "name": "Takeshi O. Yamamoto"
    },
    {
      "name": "Seongbae Yang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3mh8d83r0n0ca.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.18398",
  "fulltext_url": null,
  "id": "3mh8d83r0n0ca",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.18398",
  "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-ex"
    ],
    [
      "arxiv",
      "nucl-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.18398",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3mh8d83r0n0ca.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2606.18398",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.18398"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "First Measurement of the $K^-$ Escape Cross Section in the ${}^{12}{\\rm C}(K^{-},p)$ Reaction",
  "title_text": "First Measurement of the K^- Escape Cross Section in the ^12C(K^−,p) Reaction",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/3mh8d83r0n0ca",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/y6wr-rqjp",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}