In
physics, the stochastic vacuum model is a nonperturbative, phenomenological approach to derive
cross section in
quantum chromodynamics
In theoretical physics, quantum chromodynamics (QCD) is the theory of the strong interaction between quarks mediated by gluons. Quarks are fundamental particles that make up composite hadrons such as the proton, neutron and pion. QCD is a type ...
.
It is deemed impossible to calculate the vacuum averages of gauge-invariant quantities in QCD in a closed form, e.g. using the path integrals. But standard perturbation theory techniques don't work at distances, where the running coupling constant reaches 1.
The stochastic vacuum model is based on the approximation of nonperturbative QCD as a Gaussian process. It allows to calculate
Wilson loops.
References
* ''Field correlators in QCD'' A. Di Giacomo, H.G. Dosch, V.I. Shevchenko, Yu.A. Simonov, Phys. Repts. 372 319-368 (2002)
* ''Pomeron Physics and QCD'' S. Donnachie, H.G. Dosch, P. Landshoff, O. Nachtmann C U P (2002)
Quantum chromodynamics
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