arXiv:1611.03802·v1·High Energy Physics — Lattice
Disconnected diagrams with twisted-mass fermions
Abdou Abdel-Rehim · Constantia Alexandrou · Martha Constantinou · Jacob Finkenrath · Kyriakos Hadjiyiannakou · Karl Jansen · Christos Kallidonis · Giannis Koutsou · Alejandro Vaquero Avilés-Casco
Abstract
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.
Comments: Proceedings of the 34th annual International Symposium on Lattice Field Theory. 7 pages, 6 figures