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词汇 Weinberg angle
分类 英语词汇 英语翻译词典
释义

Weinberg angle

中文百科

温伯格角

温伯格角（英语：Weinberg angle，又叫弱混合角）是温伯格-萨拉姆的弱电统一理论 的一个参数。

定义θW

\tan \theta_W =\frac{g'}{g}

由参考[2]中(10)及(11)式:

Z_\mu=({g^2}+{g'^2})^{-1/2}(g A_\mu^3+g' B_\mu) ，
A_\mu=({g^2}+{g'^2})^{-1/2}(-g' A_\mu^3+g B_\mu).

有：

\begin{pmatrix} A \\ Z \end{pmatrix} = \begin{pmatrix} \cos \theta_W & \sin \theta_W \\ -\sin \theta_W & \cos \theta_W \end{pmatrix} \begin{pmatrix} B \\ W \end{pmatrix}

温伯格角也可定义成:

\cos\theta_W=\frac{m_W}{m_Z}
英语百科

Weinberg angle 温伯格角

The pattern of weak isospin, T3, and weak hypercharge, YW, of the known elementary particles, showing electric charge, Q, along the Weinberg angle. The neutral Higgs field (circled) breaks the electroweak symmetry and interacts with other particles to give them mass. Three components of the Higgs field become part of the massive W and Z bosons.

The Weinberg angle or weak mixing angle is a parameter in the Weinberg–Salam theory of the electroweak interaction, part of the standard model of particle physics, and is usually denoted as θW. It is the angle by which spontaneous symmetry breaking rotates the original W0 and B vector boson plane, producing as a result the Z0 boson, and the photon.
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