{
  "abstract": "We report the results of a search for sub-GeV axion-like particles (ALPs) using pilot run data from the Electron Beam-dump Experiment at KEK LINAC Switching Yard 3 (EBES). The data were collected in December 2023 with a 4 GeV positron beam and correspond to $5.7\\times10^{13}$ positrons on target. In the pilot run setup, a tungsten beam dump and a single PbO calorimeter were used. We consider ALP production via the Primakoff process induced by bremsstrahlung photons in the beam dump, followed by the decay $a\\toγγ$. The background was estimated with a data-driven method, and a signal region was defined such that the expected background yield is below 0.1 events. No events were observed after unblinding. Upper limits at the 90% confidence level were derived in the ALP mass-coupling plane, extending the experimental coverage into a region of parameter space not explored by previous searches.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.07108",
  "author_total": 21,
  "authors": [
    {
      "name": "Takahiro Fusayasu"
    },
    {
      "name": "Tomoya Iizawa"
    },
    {
      "name": "Fumihito Ikeda"
    },
    {
      "name": "Akimasa Ishikawa"
    },
    {
      "name": "Masako Iwasaki"
    },
    {
      "name": "Hiroshi Iwase"
    },
    {
      "name": "Takahiro Kawahara"
    },
    {
      "name": "Aoi Masaki"
    },
    {
      "name": "Fusashi Miyahara"
    },
    {
      "name": "Yu Morikawa"
    },
    {
      "name": "Yuichi Okayasu"
    },
    {
      "name": "Toshiyuki Ono"
    },
    {
      "name": "Hidetoshi Otono"
    },
    {
      "name": "Yasuhito Sakaki"
    },
    {
      "name": "Takumi Seino"
    },
    {
      "name": "Yuta Shimasaki"
    },
    {
      "name": "Taikan Suehara"
    },
    {
      "name": "Yosuke Takubo"
    },
    {
      "name": "Shusaku Tsumura"
    },
    {
      "name": "Kosuke Uemura"
    },
    {
      "name": "Yifu Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4fr6d1sz6dekj.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.07108",
  "fulltext_url": null,
  "id": "4fr6d1sz6dekj",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.07108",
  "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-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.07108",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4fr6d1sz6dekj.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2605.07108",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.07108"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Search for Sub-GeV Axion-Like Particles at EBES Pilot Run Using 4 GeV Positron Beam at KEK LINAC",
  "title_text": "Search for Sub-GeV Axion-Like Particles at EBES Pilot Run Using 4 GeV Positron Beam at KEK LINAC",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/4fr6d1sz6dekj",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1093/ptep/ptag178",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}