2017年12月
Gauge symmetry and the functional renormalization group
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
- 巻
- 32
- 号
- 35
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1142/S0217751X1747011X
- 出版者・発行元
- WORLD SCIENTIFIC PUBL CO PTE LTD
In the functional renormalization group (FRG), the introduction of a momentum cutoff often breaks symmetry present in a theory. The most important example is the gauge symmetry. However a symmetry survives in the presence of a cutoff in a modified form. We apply our understanding to QED as the simplest case. A modified version of the Ward-Takahashi identity is solved partially to constrain the Wilson action. Further-more, we study the flow equation for the photon 2-point function and find its analytical expression for the regulator function of the exponential type.
- リンク情報
- ID情報
-
- DOI : 10.1142/S0217751X1747011X
- ISSN : 0217-751X
- eISSN : 1793-656X
- Web of Science ID : WOS:000418463100012