Limit on the Two-Photon Production of the Glueball Candidate $f_{J}(2220)$ at CLEO

TL;DR

This paper reports a search for the two-photon production of the glueball candidate f_J(2220) using the CLEO detector, setting limits on its properties and suggesting it has significant glueball content.

Contribution

The study provides the first experimental upper limit on the two-photon production of f_J(2220) and evaluates its glueball nature through stickiness calculations.

Findings

Set a restrictive upper limit on two-photon production of f_J(2220)

Calculated a lower limit on the stickiness indicating glueball content

Suggests f_J(2220) has substantial glueball characteristics

Abstract

We use the CLEO detector at the Cornell electron-positron storage ring, CESR, to search for the two-photon production of the glueball candidate f_J(2220) in its decay to K_s K_s. We present a restrictive upper limit on the product of the two-photon partial width and the K_s K_s branching fraction. We use this limit to calculate a lower limit on the stickiness, which is a measure of the two-gluon coupling relative to the two-photon coupling. This limit on stickiness indicates that the f_J(2220) has substantial glueball content.