Extension of worldline computational algorithms for QCD to open fermionic contours

Details Extension of worldline computational algorithms for QCD to open fermionic contours Extension of worldline computational algorithms for QCD to open fermionic contours

1999-05-05

arxiv.org/abs/hep-th/9905027v3

JHEP 9911:033,1999

Physics

High Energy Physics

High Energy Physics - Theory

24 pages

Scientific paper

10.1088/1126-6708/1999/11/033

The worldline casting of a gauge field system with spin-1/2 matter fields has provided a, particle-based, first quantization formalism in the framework of which the Bern-Kosower algorithms for efficient computations in QCD acquire a simple interpretation. This paper extends the scope of applicability of the worldline scheme so as to include open fermionic paths. Specific algorithms are established which address themselves to the fermionic propagator and which are directly applicable to any other process involving external fermionic states. It is also demonstrated that in this framework the sole agent of dynamics operating in the system is the Wilson line (loop) operator, which makes a natural entrance in the worldline action; everything else is associated with geometrical properties of particle propagation, of which the most important component is Polyakov's spin factor.

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