Preliminary study of the H dibaryon in Nf=2+1 lattice QCD

We present preliminary results on the $I=0$, $S=-2$ H dibaryon in Nf=2+1 QCD. The calculation is performed with heavier-than-physical quarks (m_π ≈ 280 MeV) on a single CLS ensemble. Correlation matrices are constructed using the distillation technique and the three relevant channels, ΛΛ, NΞ, ΣΣ, are investigated to determine the interacting spectrum relevant for S-wave across multiple momentum frames. The scattering amplitude is determined by solving the corresponding two-body quantization condition. These preliminary results are part of the ongoing efforts to determine the properties of di-hyperons and to establish whether the H dibaryon exists down to physical quark masses.