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arXiv · 2603.00698

Preliminary study of the $H$ dibaryon in $N_{\rm f}=2+1$ lattice QCD

André Baião Raposo·John Bulava·Jeremy R. Green·Andrew D. Hanlon·Davide Laudicina·Malcolm Lazarow·Colin Morningstar·Amy Nicholson·Fernando Romero-López·Miguel Salg·André Walker-Loud·Hartmut Wittig
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Abstract

We present preliminary results on the $I=0$, $S=-2$ $H$ dibaryon in $N_{\rm f}=2+1$ QCD. The calculation is performed with heavier-than-physical quarks ($m_\pi \approx 280$ MeV) on a single CLS ensemble. Correlation matrices are constructed using the distillation technique and the three relevant channels, $\Lambda\Lambda$, $N\Xi$, $\Sigma\Sigma$, 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.

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André Baião Raposo, John Bulava, Jeremy R. Green, Andrew D. Hanlon, Davide Laudicina, Malcolm Lazarow, Colin Morningstar, Amy Nicholson, Fernando Romero-López, Miguel Salg, André Walker-Loud, Hartmut Wittig. 2026-02-28. Preliminary study of the $H$ dibaryon in $N_{\rm f}=2+1$ lattice QCD. https://arxiv.org/abs/2603.00698

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