{
  "abstract": "We propose a temperature-resolved Monte Carlo (MC) approach to identify the temperature regimes in which low-energy helium-burning reaction rates most strongly affect nucleosynthesis in very massive stars that undergo pair-instability supernovae (PISNe). By performing MC simulations of PISNe, we quantify how temperature-dependent variations in key helium-burning reaction rates, i.e., the triple-$α$ and $^{12}{\\rm C}(α,γ)^{16}{\\rm O}$ rates, influence $^{56}{\\rm Ni}$ synthesis. Thousands of stellar evolution calculations using $\\texttt{MESA}$ reveal that both the $^{12}{\\rm C}(α,γ)^{16}{\\rm O}$ and triple-$α$ reactions exhibit their strongest sensitivity at $T \\simeq 2.5 \\times 10^{8}\\,{\\rm K}$, but with opposite correlation signs. We show that this temperature corresponds to the regime in which the ratio of the sampled rate multipliers is most clearly imprinted on the pre-carbon-burning C/O composition. This demonstrates that PISN nucleosynthesis can probe helium-burning reaction rates in specific low-temperature regimes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.27264",
  "author_total": 3,
  "authors": [
    {
      "name": "Hiroki Kawashimo"
    },
    {
      "name": "Nobuya Nishimura"
    },
    {
      "name": "Yudai Suwa"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7v5egaa4kz4h7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.27264",
  "fulltext_url": null,
  "id": "7v5egaa4kz4h7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.27264",
  "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",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3103|Gamma-ray bursts and supernovae"
    ]
  ],
  "openalex": "W7162503749",
  "pdf_url": "https://arxiv.org/pdf/2605.27264",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7v5egaa4kz4h7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:41Z",
      "native_id": "2605.27264",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.27264"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Temperature-resolved sensitivities of $^{56}{\\rm Ni}$ production to helium-burning reactions in pair-instability supernovae",
  "title_text": "Temperature-resolved sensitivities of ^56Ni production to helium-burning reactions in pair-instability supernovae",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:41Z",
  "url": "https://research.draconitic.com/paper/7v5egaa4kz4h7",
  "venue": "arXiv",
  "versions": []
}