EPJ

2022 Impact factor 4.4
EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 9, 271-274
DOI 10.1007/s100529900088

A remark on the glueball-gluon coupling

R. Dick1 - L.P. Fulcher2

1 Sektion Physik, Ludwig-Maximilians-Universität, Theresienstrasse 37, D-80333 München, Germany
2 Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, USA

Received: 16 March 1999 / Published online: 20 May 1999

Abstract
The QCD trace anomaly motivates the consideration of a low energy glueball-gluon coupling $\phi G_{\mu\nu}{}^a G^{\mu\nu}{}_a$.We point out that this should constitute the leading kinetic term for the gluons at low energies. Anti-screening of the gluons by the glueball then induces a classical Coulomb potential of color charges which increases at large distances $\sim r^{1/3}$and motivates the inclusion of a corresponding term in the inter-quark potential.

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