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psi meson
释义
psi meson
psi meson
P5686800
(sī, psī)
n.
An electrically neutral vector meson consisting of a charm quark and a charm antiquark and having a mass about 7,213 times that of an electron and a mean lifetime of about 2 × 10
-21
second.
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更新时间:2026/8/29 12:54:10