20.500.12556/RUL-174262 Lattice study of $cc\bar{u}\bar{s}$ tetraquark channels in $D^{(*)}D^{(*)}_s$ scattering We present the first lattice quantum chromodynamics (QCD) determination of coupled $DD^*_s$ and $D^*D_s$ scattering amplitudes in the $J^P=1^+$ channel and elastic $DD_s$ scattering amplitude in the $J^P=0^+$ channel. The aim is to investigate whether tetraquarks with flavor $cc\bar{u}\bar{s}$ exist in the region near threshold. Lattice QCD ensembles from the CLS consortium with $m_\pi \sim 280~\mathrm{MeV}$, $a \sim 0.09~\mathrm{fm}$ and $L/a=24, 32$ 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 $l=0$ 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 $S$-wave amplitudes do not carry signatures of any hadron pole features in the physical amplitudes in the energy region near the threshold. lattice QCD kvantna kromodinamika na mreži true false true Angleški jezik Slovenski jezik Članek v reviji 2025-09-30 12:11:14 2025-09-30 12:11:14 2025-11-19 03:58:20 0000-00-00 00:00:00 2025 0 0 Str. 054513-1-054513-31 iss. 5 Vol. 112 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.120.811 2470-0010 10.1103/tdjf-4l5v 251059971 tdjf-4l5v.pdf tdjf-4l5v.pdf 1 2E60BB0C22D12DC4C1F828DFDA189E0F 6588be9ad66844f39a1b76938285f8015f354a1b9ebbd8f49aa6a7a03fb3c80b c6aac934-9de7-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219038 https://journals.aps.org/prd/abstract/10.1103/tdjf-4l5v 0 cd15c51e-9de7-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219039 Fakulteta za matematiko in fiziko 0 0 0