Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-08-11
Phys.Lett.B680:108-110,2009
Physics
High Energy Physics
High Energy Physics - Theory
4 pages, no figures, to appear in Physics Letters B
Scientific paper
10.1016/j.physletb.2009.08.018
In this letter we call into question the perturbatively parity breakdown at 1-loop for the massless QED_3 frequently claimed in the literature. As long as perturbative quantum field theory is concerned, whether a parity anomaly owing to radiative corrections exists or not will be definitely proved by using a renormalization method independent of any regularization scheme. Such a problem has been investigated in the framework of BPHZL renormalization method, by adopting the Lowenstein-Zimmermann subtraction scheme. The 1-loop parity-odd contribution to the vacuum-polarization tensor is explicitly computed in the framework of the BPHZL renormalization method. It is shown that a Chern-Simons term is generated at that order induced through the infrared subtractions -- which violate parity. We show then that, what is called parity anomaly, is in fact a parity-odd counterterm needed for restauring parity.
Del Cima Oswaldo M.
Franco Daniel H. T.
Piguet Olivier
Schweda Manfred
No associations
LandOfFree
No parity anomaly in massless QED3: a BPHZL approach does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with No parity anomaly in massless QED3: a BPHZL approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and No parity anomaly in massless QED3: a BPHZL approach will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-165402