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arXiv 1202.4235hep-thgr-qchep-ph
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SSB理论中的真空应力张量

Vacuum stress-tensor in SSB theories

Manuel Asorey, Petr M. Lavrov, Baltazar J. Ribeiro, Ilya L. Shapiro

摘要:

真空的重整化能量-动量张量在许多年前就已经被深入地研究过了。这些研究的主要结果是,这样一个张量应满足守恒律,反映了存在环路修正的理论的协方差。鉴于这一一般性结果,我们解决了两个重要问题,即如何以协变的方式实现动量截断以及这一一般性结果在具有自发对称性破缺的理论中是否成立.在最后一种情况下,一些新的有趣的细节出现,虽然计算是更多的参与,我们表明,最终结果满足守恒定律。

英文摘要:

The renormalized energy-momentum tensor of vacuum has been deeply explored many years ago. The main result of these studies was that such a tensor should satisfy the conservation laws which reflects the covariance of the theory in the presence of loop corrections. In view of this general result we address two important questions, namely how to implement the momentum cut-off in a covariant way and whether this general result holds in the theory with Spontaneous Symmetry Breaking. In the last case some new interesting details arise and although the calculations are more involved we show that the final result satisfies the conservation laws.

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