英语词汇“d meson”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	d meson
释义	D meson D meson n. Either of two mesons, one neutral and one positively charged, containing a charm quark and having masses 3,649 and 3,658 times that of an electron and mean lifetimes of about 4.2 × 10^-13 and 1.04 × 10^-12 second, respectively. D meson D meson [¦dē ′mā‚sän] (particle physics) Collective name for four charmed mesons that form two isotopic spin douplets, have masses of approximately 1865 MeV, and are pseudoscalar particles.
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D meson