Assuming $\iota \mathrm{}\left(1440\right)\mathrm{}$ to be a glueball, it is shown that its exchange in the $q\overline{q}$ system yields a potential that is negligible compared to the one-gluon-exchange part. This is because the glueball-quark coupling constant, deduced from experimental data, is only about a tenth of the fine-structure constant.

• Received 28 June 1982

DOI:https://doi.org/10.1103/PhysRevD.27.304