Practical techniques of QCD vs exact results of solvable models

Details Practical techniques of QCD vs exact results of solvable models Practical techniques of QCD vs exact results of solvable models

1996-12-30

arxiv.org/abs/hep-ph/9612489v3

Phys.Atom.Nucl. 60 (1997) 2056-2068; Yad.Fiz. 60 (1997) 2239-2251

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, Latex, the Table 1 caption is corrected

Scientific paper

We check quantitatively the validity of some popular phenomenological approaches of QCD in simple models. Dispersion sum rules are considered within the ladder approximation of a field-theoretic model with OPE given by ordinary loop diagrams which are computable for any number of loops. A correlator of two currents within the model complies with all requirements of standard QCD sum rules approach for fitting low-lying resonances such as fast convergence and good stability while the exact spectrum contains no resonance. Optimized PT as it is inspired by the principle of minimal sensitivity is analyzed within a quantum mechanical model and is shown to work well as compared to pure asymptotic expansion in the coupling constant or Pad\'e approximation. Renormalon technique is tested within another quantum mechanical model and is found to fail to detect its low-energy structure.

Affiliated with

Also associated with

No associations

Rating

Practical techniques of QCD vs exact results of solvable models 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 Practical techniques of QCD vs exact results of solvable models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Practical techniques of QCD vs exact results of solvable models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-512297