Composite operators from the operator product expansion: what can go wrong?

Authors
Caracciolo, S Montanari, A Pelissetto, A
Citation
S. Caracciolo et al., Composite operators from the operator product expansion: what can go wrong?, NUCL PH B-P, 83-4, 2000, pp. 875-877
Citations number
4
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
ISSN journal
09205632 → ACNP
Volume
83-4
Year of publication
2000
Pages
875 - 877
Database
ISI
SICI code
0920-5632(200004)83-4:<875:COFTOP>2.0.ZU;2-V
Abstract
The operator product expansion is used to compute the matrix elements of co mposite renormalized operators on the lattice. We study the product of two fundamental fields in the two-dimensional sigma-model and discuss the possi ble sources of systematic errors. The key problem turns out to be the viola tion of asymptotic scaling.