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Sigma terms and strangeness content of the nucleon with $Nf=2+1+1$ twisted mass fermions
We investigate excited state contaminations in a direct computation of the nucleon $\sigma$-terms. This is an important source of systematic effects that needs to be controlled besides the light quark mass dependence and ...
Evaluation of disconnected contributions using GPUs
We calculate on GPUs the disconnected diagrams associated with the nucleon form factors and moments of generalized parton distributions using Nf=2+1+1 twisted mass fermions. We employ the truncated solver method (TSM) for ...