Journal
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
Volume 49, Issue 40, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1751-8113/49/40/405401
Keywords
functional renormalisation group; Ward-Takahashi identity; QED; Wilsonian effective action; 1PI effective action
Categories
Funding
- Japan Society for the Promotion of Science [R2209, 22540270]
- EMMI
- [ERC-AdG-290623]
- Grants-in-Aid for Scientific Research [22540270] Funding Source: KAKEN
Ask authors/readers for more resources
In the functional renormalisation group approach to gauge theory, the Ward-Takahashi identity is modified due to the presence of an infrared cutoff term. It take the most accessible form for the Wilsonian effective action. In the present work we solve these identities, partially, for the Wilsonian effective action of QED. In particular, we compute the longitudinal part of the photon two point vertex function as a momentum-dependent function in the presence of the cutoff k. The resultant Wilsonian effective action carries form factors that originate from the modified Ward-Takahashi identity. We show how this result carries over to the one-particle-irreducible effective action.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available