exotic hadron
present participle of co-write
(physics) Any hadron not permitted by the quark model but allowed by the more general theory of quantum chromodynamics, including hybrid mesons, gluonia, pentaquarks, etc.
(botany) Any of the genus Sideroxylon of tropical sapotaceous trees noted for their very hard wood; ironwood.
To vow again or anew.
クォーク模型では説明できないハドロンの発見は、強い相互作用の理論を改良するよう理論家たちに迫った。
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