Strange partner of $T_{cc}^+$ from lattice QCD in $D^{(*)}D_s^{(*)}$ scattering

Tanishk Shrimal; Sara Collins; Priyajit Jana; M. Padmanath; Sasa Prelovsek

Strange partner of $T_{cc}^+$ from lattice QCD in $D^{()}D_s^{()}$ scattering

High Energy Physics - Lattice 2026-03-23 v1

Authors: Tanishk Shrimal , Sara Collins , Priyajit Jana , M. Padmanath , Sasa Prelovsek

Abstract

We report on our lattice QCD study of coupled $DD_s^* - D^*D_s$ scattering in the $J^P=1^+$ channel and elastic $DD_s$ scattering in the $J^P=0^+$ channel, aimed at investigating the possible existence of $cc\bar{u}\bar{s}$ tetraquarks near threshold. The calculation uses CLS ensembles with $m_\pi \approx 280$ MeV, lattice spacing $a \approx 0.09$ fm, and spatial extents $L/a=24, 32$ . Finite-volume spectra are obtained from a variational analysis of two-point correlation matrices constructed from two-meson operator bases using distillation. The $l=0$ partial-wave scattering amplitudes are determined from the lattice spectra in multiple moving frames using L\"uscher's formalism as well as a finite-volume implementation of the Lippmann-Schwinger equation. In both channels we observe small but nonzero shifts relative to the noninteracting spectrum, indicating weak meson interactions. The extracted physically plausible $S$ -wave amplitudes show no pole structures near threshold.

Keywords

lattice QCD tetraquark $T_{cc}^+$ scattering amplitudes finite-volume analysis

Cite

@article{arxiv.2603.19784,
  title  = {Strange partner of $T_{cc}^+$ from lattice QCD in $D^{(*)}D_s^{(*)}$ scattering},
  author = {Tanishk Shrimal and Sara Collins and Priyajit Jana and M. Padmanath and Sasa Prelovsek},
  journal= {arXiv preprint arXiv:2603.19784},
  year   = {2026}
}

Comments

10 pages, 5 figures, Contribution to the 42nd International Symposium on Lattice Field Theory (LATTICE2025), 2-8 Nov. 2025, Mumbai, India