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单词 k meson
释义

K meson


K meson

n. See kaon.

ka•on

(ˈkeɪ ɒn)

n. a meson with strangeness + 1 and either positive or zero electric charge, or its antiparticle with strangeness −1 and either negative or zero electric charge. Symbol: K Also called K meson. [1955–60; ka- (sp. of name of letter k) + (mes) on] ka•on′ic, adj.

K meson


K meson

[′kā ¦mā‚sän] (particle physics) Collective name for four pseudo-scalar mesons, having masses of about 495 MeV (megaelectronvolts) and decaying via weak interactions: K +, K -, K 0S, and K 0L; they consist of two isotopic spin doublets, the (K +, K 0) doublet and its antiparticle doublet (K -, 0), having hypercharge or strangeness of +1 and -1 respectively, where K 0 and 0 are certain combinations of KL 0 and KS 0 states. Also known as kaon. Collective name for any meson resonance belonging to an isotopic doublet with hypercharge +1 or -1, denoted KJP (m) or JP (m) respectively, where m is the mass in megaelectronvolts, and J and P are the spin and parity.
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更新时间:2025/2/22 14:08:45