Topological charge correlators, spectral bounds, and contact terms

✍ Scribed by H. Thacker; S.J. Dong; T. Draper; I. Horva´th; F.X. Lee; K.F. Liu; J.B. Zhang

• Book ID: 104354396
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 289 KB
• Volume: 119
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(03)01665-7

✦ Synopsis

The structure of topological charge fluctuations in the QCD vacuum is strongly restricted by the spectral negativity of the Euclidean correlator for 2 # 0 and the presence of a positive contact term. Some examples are considered which illustrate the physical origin of these properties.