The Glueball Filter in Central Production and Broken Scale Invariance

TL;DR

This paper explores how broken scale invariance in QCD influences the production patterns of scalar glueball candidates in central collisions, linking experimental observations to the trace anomaly structure.

Contribution

It offers a theoretical explanation connecting glueball production kinematics to broken scale invariance and trace anomaly in QCD.

Findings

Glueball production depends on transverse momenta and azimuthal angles.

Broken scale invariance influences the kinematic dependence of glueball production.

The trace anomaly structure relates to observed production patterns.

Abstract

We propose a possible explanation of the kinematical dependence of the central production of the scalar glueball candidate observed recently by the WA91 and WA102 Collaborations, and discussed by Close and Kirk, in the context of the broken scale invariance of QCD. The dependences of glueball production on the transverse momenta and azimuthal angles of the final-state protons may be related to the structure of the trace anomaly in QCD.