Can the Nambu-Goldstone boson live on the light front?

Can the Nambu-Goldstone boson live on the light front?
复制标题

南部-戈德斯通玻色子能生活在光锋上吗?

DOI:
10.1103/physrevlett.75.2632
复制
发表时间:
1995
影响因子:
8.6
通讯作者:
Koichi Yamawaki
Koichi Yamawaki
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Yoonbai Kim;S. Tsujimaru;Koichi Yamawaki

文献摘要

被引文献

相似文献

我们证明,只有通过引入显式破缺 NG 玻色子质量 $m_{\pi}$ 来规范理论,限制在光锋 (LF) 上的南部-戈德斯通 (NG) 玻色子才能存在。 NG-玻色子零模式在 LF 上积分时,必须在 $m^2_{\pi}\rightarrow 0$ 的对称极限内具有奇异行为 $\sim 1/m^2_{\pi}$。在离散低频量化中,这种特性通过线性 $\sigma$ 模型中的零模式约束得到澄清。 LF 电荷湮灭真空,而 NG 相的对称极限不守恒。
We show that the Nambu-Goldstone(NG) boson restricted on the light-front(LF) can only exist if we regularize the theory by introducing the explicit breaking NG-boson mass $m_{\pi}$. The NG-boson zero mode, when integrated over the LF, must have a singular behavior $\sim 1/m^2_{\pi}$ in the symmetric limit of $m^2_{\pi}\rightarrow 0$. In the discretized LF quantization this peculiarity is clarified in terms of the zero-mode constraints in the linear $\sigma$ model. The LF charge annihilates the vacuum, while it is not conserved in the symmetric limit in the NG phase.