e·ta-c meson 
(ātə-sē, ētə-)
(ātə-sē, ētə-)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.
| 单词 | eta-c meson |
| 释义 | e·ta-c meson (ātə-sē, ētə-)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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