Production of a tensor glueball in the reaction γγ → G2π0 at large momentum transfer

N Kivel,M Vanderhaeghen

doi:10.1016/j.physletb.2018.03.077

Abstract

We study the production of a tensor glueball in the reaction γγ→G2π0. We compute the cross section at higher momentum transfer using the collinear factorisation approach. We find that for a value of the tensor gluon coupling of fgT∼100 MeV, the cross section can be measured in the near future by the Belle II experiment.

Highlights

The hadronic states made up only from gluons are known as glueballs [1]
We study the production of a tensor glueball in the reaction γ γ → G2π 0
At present time there are few scalar candidates which can be associated with the scalar glueballs, see e.g. [6,7,8] and references therein

Summary

Introduction

The hadronic states made up only from gluons are known as glueballs [1]. The spectrum of such states have been computed using lattice QCD techniques, see e.g. Much less is even known about tensor glueballs. There are some experimental evidences that such state have been seen in various processes [9,10,11]. In this Brief Report we would like to study the production of tensor 2++ glueballs in two-photon collisions at high momentum transfer. The tensor glueball was considered only in Ref.

Calculation

Conclusions