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arXiv 1208.5763hep-th
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Anomaly与电荷的自能

Anomaly and the self-energy of electric charges

Valeri P. Frolov, Andrei Zelnikov

摘要:

研究了静态D维引力场中带电粒子的自能。我们证明了这个问题的能量泛函是不变的下的一个(D-1)-变量的标量函数参数化的变换的无限维(规范)组。证明了计算点状电荷自能的问题等价于计算有效(D-1)维欧氏量子场论的涨落$<ψ^2>$.利用点分裂正则化,我们得到了自能的表达式,并表明,它具有异常。对高维Majumdar-Papapetrou时空的自能及其反常进行了显式计算。

英文摘要:

We study the self energy of a charged particle located in a static D-dimensional gravitational field. We show that the energy functional for this problem is invariant under an infinite dimensional (gauge) group of transformations parameterized by one scalar function of (D-1)-variables. We demonstrate that the problem of the calculation of the self energy for a pointlike charge is equivalent to the calculation of the fluctuations $<ψ^2>$ for an effective (D-1)-dimensional Euclidean quantum field theory. Using point-splitting regularization we obtain an expression for the self energy and show, that it possesses anomalies. Explicit calculation of the self energy and its anomaly is done for the higher dimensional Majumdar-Papapetrou spacetimes.

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