Science

After 40 years of searching, physicists find evidence for an ultrarare particle decay

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 05/11/2026, 17:40:24 UTC.

Briefings

CERN physicists announced the detection of rare B0 meson decay into muon-antimuon pairs, a process predicted since 1984. This finding tests Standard Model predictions and represents a significant milestone in particle physics research.

Key points

• CERN physicists detected evidence of B0 meson decay into muon-antimuon pairs.
• The decay occurs when a beauty quark annihilates with a down-type quark.

Context

This discovery helps test theoretical predictions from the Standard Model, a cornerstone of modern particle physics.

Limitations

Evidence is limited to the specific decay channel mentioned; no other decay modes or broader experimental context are provided.

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