Lorentz invariance and origin of symmetries.
Lorentz invariance and origin of symmetries.
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洛伦兹不变性和对称性起源。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
H. B. Nielsen
中科院分区：
文献类型：
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作者：
J. Chkareuli;C. Froggatt;H. B. Nielsen
我们重新考虑洛伦兹不变性在所观察到的内部对称性的动态生成中的作用。我们认为，一般来说，洛伦兹不变性可以施加只有在这个意义上说，所有的洛伦兹非不变效应所造成的自发破坏的洛伦兹对称性是物理上不可观察的。应用这一原则的最一般的相对论不变的拉格朗日，与任意耦合的所有领域参与，导致外观的对称性，更重要的是，无质量的向量场衡量这种对称性在阿贝尔和非阿贝尔的情况下。相反，纯粹的全局对称性只是规范对称性的偶然结果。
We reconsider the role of Lorentz invariance in the dynamical generation of the observed internal symmetries. We argue that, generally, Lorentz invariance can be imposed only in the sense that all Lorentz noninvariant effects caused by the spontaneous breakdown of Lorentz symmetry are physically unobservable. The application of this principle to the most general relativistically invariant Lagrangian, with arbitrary couplings for all the fields involved, leads to the appearance of a symmetry and, what is more, to the massless vector fields gauging this symmetry in both Abelian and non-Abelian cases. In contrast, purely global symmetries are generated only as accidental consequences of the gauge symmetry.