QUENCHED CHIRAL LOGS, THE ETA' MASS, AND THE HAIRPIN DIAGRAM

Authors
DUNCAN A EICHTEN E PERRUCCI S THACKER H
Citation
A. Duncan et al., QUENCHED CHIRAL LOGS, THE ETA' MASS, AND THE HAIRPIN DIAGRAM, Nuclear physics. B, 1997, pp. 256-258
Citations number
5
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. B → ACNP
ISSN journal
05503213
Year of publication
1997
Supplement
53
Pages
256 - 258
Database
ISI
SICI code
0550-3213(1997):<256:QCLTEM>2.0.ZU;2-3
Abstract
Limits on the size of quenched chiral logs in the pion mass for Wilson fermions are investigated. The smallness of chiral logs is shown to b e a result of the suppression of the hairpin diagram for small p(2), s uch that the value of the hairpin on the pion mass shell is much small er than the physical m(eta')(2),. A direct calculation of the topologi cal susceptibility from the same data gives m(eta'), approximate to 1 GeV.