Lightest glueball and scalar meson nonet in production and decay

TL;DR

This paper discusses the classification of scalar mesons and the lightest glueball, proposing that certain broad states are components of a single glueball and suggesting experimental investigation in gluon jet fragmentation.

Contribution

It introduces a new classification scheme for scalar mesons and the lightest glueball, and proposes studying glueball production in gluon jet fragmentation regions.

Findings

f_0(980) and f_0(1500) are classified as part of the 0^{++} nonet

f_0(400-1200) and f_0(1370) are components of a broad glueball

Proposal to investigate glueball production in gluon jets

Abstract

Recent results concerning the evidence and classification of the J^{PC}=0^{++} states, obtained with P. Minkowski, are presented: The isoscalars f_0(980) and f_0(1500) are classified as members of the 0^{++} nonet, while the broad state called f_0(400-1200) and the state f_0(1370) are considered as different components of a single broad resonance, the lowest-lying 0^{++} glueball. Furthermore, we propose the investigation of glueball production in the fragmentation region of gluon jets.