How good is the quenched approximation of QCD?
Apr, 199422 pages
Part of High-energy particle physics. Proceedings, 3rd Workshop, WHEPP-3, Madras, India, January 10-22, 1994
Published in:
- Pramana 45 (1995) S141-S154
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e-Print:
- hep-lat/9405002 [hep-lat]
DOI:
Report number:
- WASH-U-HEP-94-62
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Abstract:
The quenched approximation for QCD is, at present and in the foreseeable future, unavoidable in lattice calculations with realistic choices of the lattice spacing, volume and quark masses. In this talk, I review an analytic study of the effects of quenching based on chiral perturbation theory. Quenched chiral perturbation theory leads to quantitative insight on the difference between quenched and unquenched QCD, and reveals clearly some of the diseases which are expected to plague quenched QCD. Uses jnl.tex and epsf.tex for figure 3. Figures 1 and 2 not included, sorry. Available as hardcopy on request.Note:
- 22 pages, Wash. U. HEP/94-62 (Forgotten set of macros now included, sorry.)
- talk: Madras 1994/01/10
- quantum chromodynamics
- lattice field theory
- field theory: Euclidean
- approximation: quenching
- perturbation theory: chiral
- ghost
- Goldstone particle
- K: decay constant
- decay constant: K
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