- Open Access
Lattice study of tetraquark channels in scattering
Phys. Rev. D 112, 054513 – Published 26 September, 2025
DOI: https://doi.org/10.1103/tdjf-4l5v
Abstract
We present the first lattice quantum chromodynamics (QCD) determination of coupled and scattering amplitudes in the channel and elastic scattering amplitude in the channel. The aim is to investigate whether tetraquarks with flavor exist in the region near threshold. Lattice QCD ensembles from the CLS consortium with , and , 32 are utilized. Finite-volume spectra are determined via variational analysis of two-point correlation matrices, computed using large bases of operators resembling bilocal two-meson structures within the distillation framework. The scattering matrix for partial wave is determined using lattice eigenenergies from multiple inertial frames following Lüscher’s formalism as well as following the solutions of Lippmann-Schwinger equation in the finite-volume on a plane-wave basis. We observe small nonzero energy shifts in the simulated spectra from the noninteracting scenario in both the channels studied, which points to rather weak nontrivial interactions between the mesons involved. Despite the nonzero energy shifts, the lattice-extracted -wave amplitudes do not carry signatures of any hadron pole features in the physical amplitudes in the energy region near the threshold.
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