https://doi.org/10.1051/epjconf/202024506031
Directly calculating the glue component of the nucleon in lattice QCD: QCDSF–UKQCD–CSSM Collaborations
1
CSSM, Department of Physics, University of Adelaide, Adelaide SA 5005, Australia
2
School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, UK
3
RIKEN Advanced Institute for Computational Science, Kobe, Hyogo 650-0047, Japan
4
Institut für Theoretische Physik, Universität Leipzig, 04109 Leipzig, Germany
5
Theoretical Physics Division, Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, UK
6
Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany
7
Universität Hamburg, Regionales Rechenzentrum, 20146 Hamburg, Germany
* e-mail: tomas.howson@adelaide.edu.au
Published online: 16 November 2020
We are investigating the direct determination and non-perturbative renormalisation of gluon matrix elements. Such quantities are sensitive to ultra– violet fluctuations, and are in general statistically noisy. To obtain statistically significant results, we extend an earlier application of the Feynman–Hellmann theorem to gluonic matrix elements to calculate a renormalisation factor in the RI – MOM scheme, in the quenched case. This work demonstrates that the Feynman–Hellmann method is capable of providing a feasible option for calculating gluon quantities.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
