On the existence of glueballs

Authors
Citation
E. Klempt, On the existence of glueballs, ACT PHY P B, 31(10-11), 2000, pp. 2587-2598
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA B
ISSN journal
0587-4254 → ACNP
Volume
31
Issue
10-11
Year of publication
2000
Pages
2587 - 2598
Database
ISI
SICI code
0587-4254(200010/11)31:10-11<2587:OTEOG>2.0.ZU;2-B
Abstract
Lattice gauge calculations require the existence of glueballs. In particula r a scalar glueball is firmly predicted at a mass of 1700 MeV. This predict ion has led to an intense study of scalar isoscalar interactions and to the discovery of several states. The number of scalar states observed seems to exceed the number of states which can be accommodated in the quark model. None of these states has a decay pattern which is consistent with that of a pure glueball but mixing of scalar (q) over barq states with the scalar gl ueball provides for a reasonable interpretation of the data. In this paper we scrutinize the evidence for these states and their production characteri stics. The f(0)(1370) - a cornerstone of all (q) over barq-glueball mixing scenarios is shown to be likely of non-(q) over barq nature. The remaining scalar states then do fit into a nonet classification. If this interpretati on should be correct there would be no room for resonant scalar gluon-gluon interactions, no room for the scalar glueball.