Speaker
Lukas Varnhorst
Summary
The light and strange nucleon sigma terms measure
the corresponding quark contents of the nucleon.
Especially the strangeness content is of significant interest for
dark matter searches as it determines the coupling of
several dark matter candidates to hadronic matter.
While the sigma terms can not be measured directly
they can be determined via lattice QCD from first
principles.
In this talk recently determined values of the the up-/down-
and strange-sigma term by the BMW collaboration are discussed.
The sigma terms have been extracted via the
Feynman-Hellmann-theorem from the light quark and
strange quark dependence of the nucleon mass. Furthermore
individual u- and d-quark-contents for both the proton and
the neutron are considered.
