Disconnected diagrams with twisted-mass fermions

Understand

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.