{
  "id": 18344940,
  "title": "After 40 years of searching, physicists find evidence for an ultrarare particle decay",
  "url": "https://urgent.news/2026/11/05/after-40-years-of-searching-physicists-find-evidence-for-an-ultrarare",
  "topic": "science",
  "section": "Science",
  "published": "2026-11-05T17:30:02.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-11-years-physicists-evidence-ultrarare-particle.html"
  },
  "original_language": "en",
  "account": null,
  "summary": "Physicists at CERN report that they've detected evidence of a rare meson particle decay (B⁰→ µ⁺µ⁻) that occurs when the meson's beauty quark annihilates with a down-type quark. The pair decays into a muon and antimuon, which are particles similar to electrons. Because evidence for this decay helps test theoretical predictions from the Standard Model, physicists have been waiting for it since…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}