Speaker
Tomas Howson
(University of Adelaide)
Description
Computing the gluon component of momentum in the nucleon is a difficult and computationally expensive problem, as the matrix element involves a quark-line-disconnected gluon operator which suffers from ultra-violet fluctuations. But also necessary for a successful determination is the non-perturbative renormalisation of this operator. We investigate this renormalisation here by direct computation in the RI mom scheme. A clear statistical signal is obtained in the direct calculation by an adaption of the Feynman-Hellmann technique. A comparison is conducted in order to verify the energy-momentum sum rule of the nucleon.
| Consider for promotion | No |
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Primary authors
Tomas Howson
(University of Adelaide)
Roger Horsley
(University of Edinburgh)
Waseem Kamleh
(University of Adelaide)
Yoshifumi Nakamura
Holger Perlt
(University of Leipzig)
Paul Rakow
(University of Liverpool)
Gerrit Schierholz
(DESY)
Hinnerk Stüben
Ross Young
(University of Adelaide)
James Zanotti
(University of Adelaide)
