Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-08-09
Phys.Lett. B468 (1999) 279-286
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, no tables, no figures, typos corrected, material and references added. Shorten version to appear in Phys.Lett. B
Scientific paper
10.1016/S0370-2693(99)01222-8
The validity of the ladder approximation (LA) in QCD and QED in the context of the corresponding Schwinger-Dyson (SD) equations and Slavnov-Taylor (ST) and Ward-Takahashi (WT) identities is investigated. In contrast to QED, in QCD bacause of color degrees of freedom the summation of the ladder diagrams within the Bethe-Salpeter (BS) integral equation for the quark-gluon vertex at zero momentum transfer on account of the corresponding ST identity does provide an an addition constraint on the quark SD equation itself. Moreover, the solution of the constraint equation requires the full quark propagator should be almost trivial (free-type) one, i. e. there is nontrivial quark propagator in the LA in QCD. This triviality results in the fact that the standard LA ignores the self-interaction between gluons caused by color charges (non-Abelian character of QCD).
No associations
LandOfFree
Triviality of the quark propagator in the ladder approximation in QCD 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 Triviality of the quark propagator in the ladder approximation in QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Triviality of the quark propagator in the ladder approximation in QCD will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-221860