Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-12-25
Physics
High Energy Physics
High Energy Physics - Theory
Proceedings of ICGA8, 4 pages, 3 figures
Scientific paper
We examine the Casimir energy of 5D electro-magnetism in the recent standpoint. Z$_2$ symmetry is taken into account. After confirming the consistency with the past result, we do new things based on a new regularization. The regularization is based on the minimal area principle and the regularized configuration is the {\it sphere lattice}. We do it not in the Kaluza-Klein expanded form but in the closed form. The formalism is based on the heat-kernel approach using the position/momentum propagator. A useful expression of the Casimir energy, in terms of the P/M propagator, is obtained. Renormalization flow is realized as the change along the extra-axis.
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