psi meson 
(sī, psī)
(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.
| 单词 | psi meson |
| 释义 | psi meson (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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