A Lattice Study of the Glue in the Nucleon

Authors :: Horsley, R.
Millo, R.
Nakamura, Y.
Perlt, H.
Pleiter, D.
Rakow, P. E. L.
Schierholz, G.
Schiller, A.
Winter, F.
Zanotti, J. M.
Publication Year :: 2012
Abstract: By introducing an additional operator into the action and using the Feynman-Hellmann theorem we describe a method to determine both the quark line connected and disconnected terms of matrix elements. As an illustration of the method we calculate the gluon contribution (chromo-electric and chromo-magnetic components) to the nucleon mass.<br />Comment: 11 pages, 3 figures, typos corrected, published version (Phys. Lett. B)