单词	K-meson
释义	K-meson /keɪˈmiːzɒn / /keɪˈmɛzɒn/ noun Another term for kaon.Scientists were expecting it to decay into a K-meson.... And observing a decay mode with a branching ratio on the order of 3E - 11 requires a prodigious number of K-mesons in order to achieve the desired sensitivity. The surprising feature, however, was something that was not seen: the neutral K-meson was never seen to decay into an electron and a positron. Origin 1950s: from K (for kaon) + meson.
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