PoS(Confinement8)084 The Glueball Spectrum from Constituent Gluon Models V. Mathieu * † Université de Mons-Hainaut, Académie universitaire Wallonie-Bruxelles, 20 Place du Parc, B-7000 Mons, Belgique E-mail: vincent.mathieu@umh.ac.be F. Buisseret ‡ Université de Mons-Hainaut, Académie universitaire Wallonie-Bruxelles, 20 Place du Parc, B-7000 Mons, Belgique E-mail: fabien.buisseret@umh.ac.be C. Semay § Université de Mons-Hainaut, Académie universitaire Wallonie-Bruxelles, 20 Place du Parc, B-7000 Mons, Belgique E-mail: claude.semay@umh.ac.be B. Silvestre-Brac LPSC Université Joseph Fourier, Grenoble 1 CNRS/IN2P3, Institut Polytechnique de Grenoble, 53 Avenue des Martyrs, F-38026 Grenoble-Cedex, France E-mail: silvestre@lpsc.in2p3.fr We present a model for odd- C (negative charge parity) glueballs with three constituent gluons. The model is an extension of a previous study of two-gluon glueballs. We show that, even if spin- 1 gluons seem to reproduce properly the lattice QCD spectrum for C =+ states, the extension for C = - cannot match with the lattice results. Resorting to the helicity formalism, we show how transverse gluons ﬁt in better agreement the lattice QCD spectrum. We then conclude that even if gluons gain an effective mass, they remain transverse particles. 8th Conference Quark Conﬁnement and the Hadron Spectrum September 1-6 2008 Mainz, Germany * Speaker. † IISN research worker. ‡ F.R.S.-FNRS post-doctoral researcher. § F.R.S.-FNRS senior research associate. c  Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. http://pos.sissa.it/