# After 40 years, CERN finds evidence of a one-in-10-billion particle decay > HelixNews · Web page: https://helixnews.one/story/7893 · All pages for agents: https://helixnews.one/llms.txt 1 outlet covering · First listed: ScienceDaily, Nov 9, 2026, 6:42 PM · Read it: CERN scientists have finally found evidence of a particle decay so rare that it happens only once in roughly 10 billion decays, ending a search spanning more than 40 years. The breakthrough could help physicists uncover hidden particles and forces that lie beyond the reach of today's most powerful accelerators. ## Who's covering it In the order they published: - Nov 9, 2026, 6:42 PM: [After 40 years, CERN finds evidence of a one-in-10-billion particle decay]() — ScienceDaily (Science news, United States) CERN scientists have finally found evidence of a particle decay so rare that it happens only once in roughly 10 billion decays, ending a search spanning more than 40 years. The breakthrough could help physicists uncover hidden particles and forces that lie beyond the reach of today's most powerful accelerators.