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单词 GIM mechanism
释义

GIM mechanism

中文百科

GIM机制

在粒子物理中,GIM 机制(或者Glashow–Iliopoulos–Maiani mechanism)是一种压低FCNC过程(味改变的中性流过程)的机制。它是由谢尔登·格拉肖, 李尔普罗斯和卢西恩·梅安尼于1970年提出的。

GIM机制引入了第四个夸克——粲夸克,由此产生了新的振幅从而使FCNC过程的总振幅为零。它所引入的粲夸克在1974年由丁肇中和伯顿·里克特分别独立发现,由此证实了GIM机制。

英语百科

GIM mechanism GIM机制

In quantum field theory, the GIM mechanism (or Glashow–Iliopoulos–Maiani mechanism) is the mechanism by which flavour-changing neutral currents (FCNCs) are suppressed. It also explains why weak interactions that change strangeness by 2 (ΔS = 2 transitions) are suppressed while those that change strangeness by 1 (ΔS = 1 transitions) are allowed. The mechanism was put forth by Sheldon Lee Glashow, John Iliopoulos and Luciano Maiani in their famous paper "Weak Interactions with Lepton–Hadron Symmetry" published in Physical Review D in 1970.

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更新时间:2025/6/23 4:36:16