A Preliminary Lattice Study of the Glue in the Nucleon
  About half the mass of a hadron is given from gluonic contributions. In this talk we calculate the chromo-electric and chromo-magnetic components of the nucleon mass. These computations are numerically difficult due to gluon field ultra-violet fluctuations. Nevertheless a high statistics feasibility run using quenched Wilson fermions seems to show reasonable signals. 
M. Goeckeler, R. Horsley, E.-M. Ilgenfritz, H. Oelrich, H. Perlt,   P.E.L. Rakow, G. Schierholz, A. Schiller and P. Stephenson