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PoS(LATTICE2016)155

Disconnected diagrams with twisted-mass fermions

A. Abdel-Rehim, C. Alexandrou, M. Constantinou, J. Finkenrath, K. Hadjiyiannakou, K. Jansen, C. Kallidonis, G. Koutsou, A. Vaquero Avilés-Casco, J. Volmer

in 34th annual International Symposium on Lattice Field Theory

Contribution: pdf

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.