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
中科院分区:
文献类型:
--
作者:
Yoonbai Kim;S. Tsujimaru;Koichi Yamawaki
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.