kaonn.

Brit.

/ˈkeɪɒn/, U.S.

/ˈkeɪˌɑn/

Forms: 1900s kayon (rare, irregular), 1900s– kaon.

Origin: Formed within English, by derivation. Etymons: English ka , -on suffix¹.

Etymology: < ka, kay, representing the pronunciation of the letter K (in K meson n., K-particle n.) + -on suffix¹.

Particle Physics.

Originally: any of a group of pseudoscalar mesons with masses several times that of a pion and non-zero strangeness, which on decaying usually produce two or three pions or a muon and a neutrino; (in later use, equivalently) a meson composed of a strange quark (or antiquark) and an up or down antiquark (or quark); = K meson n.

ΘΚΠ

the world > matter > physics > atomic physics > particle physics > particle participating in strong interaction > meson > [noun] > kaon

K-particle1949

V1950

K meson1954

kaon1958

1958 Philos. Mag. 3 330 Writing m_K⁺, m_π⁺, m_π⁰, m_μ, for the kayon, charged pion, neutral pion, and muon masses.

1958 Proc. 2nd U.N. Internat. Conf. Peaceful Uses Atomic Energy XXX. 44/2 When the newly produced kaons disintegrate, only half of them should exhibit the short lifetime 10⁻¹⁰ sec.

1968 New Scientist 18 Jan. 144/2 Cosmic-ray muons are the product of the radioactive decay of the mesons known as pions and kaons.

1987 E. Regis Who got Einstein's Office? vi. 142 What was troubling about the kaon decay was that the parity of the two sets of decay products was different.

1991 Sci. News 11 May 298/1 Their rewards included the discovery of a new zoo of elementary particles: kaons, pions and muons.

2011 New Scientist 26 Nov. 6/3 Each can decay into a pair of lighter mesons, making a pion plus an anti-pion or a kaon plus an anti-kaon.

This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022).

单词	kaon
释义	kaonn. Brit. /ˈkeɪɒn/, U.S. /ˈkeɪˌɑn/ Forms: 1900s kayon (rare, irregular), 1900s– kaon. Origin: Formed within English, by derivation. Etymons: English ka , -on suffix¹. Etymology: < ka, kay, representing the pronunciation of the letter K (in K meson n., K-particle n.) + -on suffix¹. Particle Physics. Originally: any of a group of pseudoscalar mesons with masses several times that of a pion and non-zero strangeness, which on decaying usually produce two or three pions or a muon and a neutrino; (in later use, equivalently) a meson composed of a strange quark (or antiquark) and an up or down antiquark (or quark); = K meson n. ΘΚΠ the world > matter > physics > atomic physics > particle physics > particle participating in strong interaction > meson > [noun] > kaon K-particle1949 V1950 K meson1954 kaon1958 1958 Philos. Mag. 3 330 Writing m_K⁺, m_π⁺, m_π⁰, m_μ, for the kayon, charged pion, neutral pion, and muon masses. 1958 Proc. 2nd U.N. Internat. Conf. Peaceful Uses Atomic Energy XXX. 44/2 When the newly produced kaons disintegrate, only half of them should exhibit the short lifetime 10⁻¹⁰ sec. 1968 New Scientist 18 Jan. 144/2 Cosmic-ray muons are the product of the radioactive decay of the mesons known as pions and kaons. 1987 E. Regis Who got Einstein's Office? vi. 142 What was troubling about the kaon decay was that the parity of the two sets of decay products was different. 1991 Sci. News 11 May 298/1 Their rewards included the discovery of a new zoo of elementary particles: kaons, pions and muons. 2011 New Scientist 26 Nov. 6/3 Each can decay into a pair of lighter mesons, making a pion plus an anti-pion or a kaon plus an anti-kaon. This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022). < n.1958
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