Computing the nucleon sigma terms at the physical point

TL;DR

This paper reports preliminary lattice QCD calculations of nucleon sigma terms at physical pion mass, which are important for understanding hadron structure and dark matter detection.

Contribution

It provides new lattice QCD results for nucleon sigma terms at the physical point using simulations at multiple lattice spacings.

Findings

Preliminary results for up-down and strange sigma terms.

Simulations performed at five lattice spacings.

Pion masses reach the physical value.

Abstract

Nucleon sigma terms are quantities that play an important role in various areas: among others, they connect the pion-nucleon and the kaon-nucleon amplitudes to the hadron spectrum and they are also relevant for the direct detection of Dark Matter. We present preliminary results for the up-down and strange sigma terms obtained from $N_f=2+1$ lattice simulations that are performed at five lattice spacings and for pion masses all the way down to its physical value.