Speaker
Description
Within the RQCD collaboration, we are currently updating the determination of the gradient flow scale at the physical point using the $\Xi$ baryon mass as input. We utilize more than 50 CLS ensembles generated with non-perturbatively $O(a)$-improved Wilson dynamical fermions. These ensembles comprise six lattice spacings in the range of $a = 0.04-0.1$ fm, spatial volumes satisfying $L M_\pi > 4$, and pion masses ranging from around 420 MeV down to the physical point. Compared to our previous determination, we have improved the statistics on existing key ensembles and added several new ones. Most notable is a $256 \times 128^3$ lattice at almost physical quark masses with a small lattice spacing of $a \approx 0.05$ fm. Combined quark-mass, continuum-limit, and finite-volume fits are performed on the baryon octet masses along three trajectories in the quark-mass plane. This approach tightly constrains the baryon masses at the physical point. Besides the details on the numerical computation, we also present aspects of data management and provenance.