The latest results from the Twisted-Mass collaboration on disconnected diagrams at the physical value of the pion mass are presented. In particular, we focus on the sigma terms, the axial charges and the momentum fraction, all of them for the nucleon. A detailed error analysis for each observable follows, showing the strengths and weaknesses of the one-end trick. Alternatives are discussed.
@article{arxiv.1611.03802,
title = {Disconnected diagrams with twisted-mass fermions},
author = {Abdou Abdel-Rehim and Constantia Alexandrou and Martha Constantinou and Jacob Finkenrath and Kyriakos Hadjiyiannakou and Karl Jansen and Christos Kallidonis and Giannis Koutsou and Alejandro Vaquero Avilés-Casco},
journal= {arXiv preprint arXiv:1611.03802},
year = {2016}
}
Comments
Proceedings of the 34th annual International Symposium on Lattice Field Theory. 7 pages, 6 figures