pionium

Noun

Meaning

(physics, chemistry) an exotic atom equivalent to a hydrogen atom with the proton replaced by a pion

(physics) an onium where the bound antiparticle-particle pair is a pion and an antipion.

Synonyms

Examples

Understanding bound states of hadrons such as pionium and protonium is also important in order to clarify notions related to exotic hadrons such as mesonic molecules and pentaquark states. Source: Internet

The DIRAC collaboration was able to detect 21227 atomic pairs from a total of main events, which allows the pionium lifetime to be determined to within statistical errors of 9%. Source: Internet

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