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K meson |
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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-,K0S, andK0L; they consist of two isotopic spin doublets, the (K+,K0) doublet and its antiparticle doublet (K-,K̄0), having hypercharge or strangeness of +1 and -1 respectively, whereK0andK̄0are certain combinations ofKL0andKS0states. Also known as kaon. Collective name for any meson resonance belonging to an isotopic doublet with hypercharge +1 or -1, denotedKJP(m) orK̄JP(m) respectively, wheremis the mass in megaelectronvolts, andJandPare the spin and parity. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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