Searching for the Scalar Glueball

Journal Article · Sun Aug 31 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2973500· OSTI ID:21149168

Ochs, Wolfgang ^[1]

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1. Max-Planck-Institut fuer Physik, Werner-Heisenberg Institut D-80805 Munich, Foehringer Ring 6 (Germany)

Existence of gluonic resonances is among the early expectations of QCD. Today, QCD calculations predict the lightest glueball to be a scalar state with mass within a range of about 900-1700 MeV but there is no consensus about its experimental evidence. In a re-analysis of the phase shifts for {pi}{pi} scattering up to 1800 MeV where such states should show up we find the broad resonance f{sub 0}(600)/{sigma} contributing to the full mass range and the narrow f{sub 0}(980) and f{sub 0}(1500) but no evidence for f{sub 0}(1370). Phenomenological arguments for the broad state to be a glueball are recalled. It is argued that the large radiative width of f{sub 0}(600)/{sigma} reported recently is not in contradiction to this hypothesis but is mainly due to {pi}{pi}-rescattering. The small 'direct' radiative component is consistent with QCD sum rule predictions for the light glueball.

• OSTI ID: 21149168
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1030; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
F0-980 MESONS
GLUEBALLS
MEV RANGE
PARTICLE IDENTIFICATION
PHASE SHIFT
PION-PION INTERACTIONS
QUANTUM CHROMODYNAMICS
QUARK-ANTIQUARK INTERACTIONS
RESCATTERING
RESONANCE PARTICLES
REST MASS
SUM RULES