TY  - JOUR
A1  - Qin, Si-xue
A1  - Chang, Lei
A1  - Liu, Yu-xin
A1  - Roberts, Craig D.
A1  - Schmidt, Sebastian M.
T1  - Practical corollaries of transverse Ward–Green–Takahashi identities
T2  - Physics Letters B
N2  - The gauge principle is fundamental in formulating the Standard Model. Fermion–gauge-boson couplings are the inescapable consequence and the primary determining factor for observable phenomena. Vertices describing such couplings are simple in perturbation theory and yet the existence of strong-interaction bound-states guarantees that many phenomena within the Model are nonperturbative. It is therefore crucial to understand how dynamics dresses the vertices and thereby fundamentally alters the appearance of fermion–gauge-boson interactions. We consider the coupling of a dressed-fermion to an Abelian gauge boson, and describe a unified treatment and solution of the familiar longitudinal Ward–Green–Takahashi identity and its less well known transverse counterparts. Novel consequences for the dressed-fermion–gauge-boson vertex are exposed.
KW  - Quantum electrodynamics
KW  - Dynamical chiral symmetry breaking
KW  - Dyson–Schwinger equations
KW  - Fermion–gauge-boson vertex
Y1  - 2013
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/76758
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-767585
SN  - 0370-2693
VL  - 722.2013
IS  - 4
SP  - 384
EP  - 388
PB  - Elsevier
CY  - Amsterdam
ER  -