Potential NRQCD: an effective theory for heavy quarkonium

Citation
N. Brambilla et al., Potential NRQCD: an effective theory for heavy quarkonium, NUCL PHYS B, 566(1-2), 2000, pp. 275-310
Citations number
80
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS B
ISSN journal
05503213 → ACNP
Volume
566
Issue
1-2
Year of publication
2000
Pages
275 - 310
Database
ISI
SICI code
0550-3213(20000131)566:1-2<275:PNAETF>2.0.ZU;2-U
Abstract
Within an effective field theory framework we study heavy-quark-antiquark s ystems with a typical distance between the heavy quark and the antiquark sm aller than 1/Lambda(QCD). A suitable definition of the potential is given w ithin this framework, while non-potential (retardation) effects are taken i nto account in a systematic way. We explore different physical systems. Mod el-independent results on the short distance behaviour of the energies of t he gluonic excitations between static quarks are obtained. Finally, we show how infrared renormalons affecting the static potential get cancelled in t he effective theory. (C) 2000 Elsevier Science B.V. All rights reserved.