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单词
eta-c meson
释义
eta-c meson
Related to eta-c meson: eta prime meson
e·ta-c meson
E0224550
(ā′tə-sē′, ē′tə-)
n.
An electrically neutral meson composed of a charm quark and a charm antiquark and having a mass 5,832 times that of the electron and a mean lifetime of about 2.6 × 10
-23
second.
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更新时间:2025/3/4 8:27:44