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单词 Chi meson
释义

Chi meson

英语百科

List of mesons

 The decay of a kaon (K+) into three pions (2 π+, 1 π−) is a process that involves both weak and strong interactions.Weak interactions: The strange antiquark (s) of the kaon transmutes into an up antiquark (u) by the emission of a W+ boson; the W+ boson subsequently decays into a down antiquark (d) and an up quark (u).Strong interactions: An up quark (u) emits a gluon (g) which decays into a down quark (d) and a down antiquark (d).
This list is of all known and predicted scalar, pseudoscalar and vector mesons. See list of particles for a more detailed list of particles found in particle physics.

Mesons are unstable subatomic particles composed of one quark and one antiquark. They are part of the hadron particle family – particles made of quarks. The other members of the hadron family are the baryons – subatomic particles composed of three quarks. The main difference between mesons and baryons is that mesons have integer spin (thus are bosons) while baryons are fermions (half-integer spin). Because mesons are bosons, the Pauli exclusion principle does not apply to them. Because of this, they can act as force mediating particles on short distances, and thus play a part in processes such as the nuclear interaction.

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更新时间:2025/6/21 5:39:19