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单词 Yukawa coupling
释义

Yukawa coupling

中文百科

汤川耦合 Yukawa interaction

(重定向自Yukawa coupling)

汤川耦合(英文:Yukawa's interaction),在粒子物理学中用来描述标量场与狄拉克场之间相互作用的量,其拉格朗日量:

\mathcal{L}_\mathrm{yukawa}(\phi,\psi)
 =-g\bar{\psi}\Gamma\psi \phi

其中g是汤川相互作用中的耦合常数取名汤川耦合常数\Gamma定义为:

\Gamma = \begin{cases}
 1 & (\text{scalar}) \\
 i\gamma_5 & (\text{pseudoscalar}) \\
\end{cases}

汤川耦合是纪念日本物理学家汤川秀树,一般用来描述原子核力即核子与介子之间的相互作用,在标准模型中希格斯场与无质量的夸克和轻子场相耦合通过自发对称性破缺使得费米子从希格斯场的真空期待值获得质量。

英语百科

Yukawa interaction 汤川耦合

(重定向自Yukawa coupling)

In particle physics, Yukawa's interaction, named after Hideki Yukawa, is an interaction between a scalar field ϕ and a Dirac field ψ of the type

The Yukawa interaction can be used to describe the nuclear force between nucleons (which are fermions), mediated by pions (which are pseudoscalar mesons). The Yukawa interaction is also used in the Standard Model to describe the coupling between the Higgs field and massless quark and lepton fields (i.e., the fundamental fermion particles). Through spontaneous symmetry breaking, these fermions acquire a mass proportional to the vacuum expectation value of the Higgs field.

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更新时间:2025/6/21 13:55:02