Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-04-20
Physics
High Energy Physics
High Energy Physics - Theory
Ph. D. Thesis. English version. Originally submitted in spanish to the Universidad Michoacana de San Nicolas de Hidalgo, Mexic
Scientific paper
We study the specific role that the Ward-Green-Takahashi identity plays in the restoration of the gauge independence of the physical observables related to the phenomenon of Dynamical Symmetry Breaking in QED3, the chiral condensate and the fermion mass, in the framework of the Schwinger-Dyson equations (SDE). We see in the lack of gauge independence of the physical observables the necessity of including further gauge invariance constraints and study the gauge covariance of the Fermion Propagator (FP) through its Landau-Khalatnikov-Fradkin transformation. From this we stress that 1) in order to achieve full gauge independence of the physical observables we must include the Full Vertex in the corresponding SDE for the FP, and 2) that Perturbation Theory (PT) is the only scheme where this gauge independence as well as all of the gauge invariance constraints are satisfied order by order. Therefore we carry out the construction of the fermion-boson vertex taking PT as a guide upto the first order of approximation. We completely relate this vertex to the FP and propose a non perturbative form for it. Furthermore, we write this non perturbative vertex in a suitable form for its future implementation in similar studies.
No associations
LandOfFree
Gauge Invariance and Construction of the Fermion-Boson Vertex in QED3 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 Gauge Invariance and Construction of the Fermion-Boson Vertex in QED3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gauge Invariance and Construction of the Fermion-Boson Vertex in QED3 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-55653