Prelovsek, Sasa and Ortiz-Pacheco, Emmanuel and Collins, Sara and Leskovec, Luka and Padmanath, M. and Vujmilovic, Ivan (2025) Doubly heavy tetraquarks from lattice QCD: Incorporating diquark-antidiquark operators and the left-hand cut. PHYSICAL REVIEW D, 112 (1): 014507. ISSN 2470-0010, 2470-0029
Full text not available from this repository. (Request a copy)Abstract
Lattice studies of the doubly charm tetraquark Tcc = ccu<overline> d<overline> require the determination of the DD* scattering amplitude, which most often incorporate only meson-meson interpolators. We additionally incorporate diquark-antidiquark operators and find that these have some impact on certain eigenenergies. This study presents the first extraction of the DD* scattering amplitude based on the meson-meson as well as diquark antidiquark interpolators. The effect of the additional operators renders slightly smaller values of p cot delta 0 and a Tcc pole slightly closer to the threshold. The scattering amplitude is extracted from eigenenergies by adopting plane-wave and effective-field-theoretic methods, which also incorporate the left-hand cut and address the partial wave mixing. The Tcc is found to be a subthreshold resonance with a pole at mTcc - mD - mD* = -5.2+0.7-0.8 - i <middle dot> 6.3+2.4 ensembles with m pi similar or equal to 280 MeV and the distillation method. A more significant effect of diquarkantidiquark operators on eigen-energies is found for larger heavy quark masses relevant for Tbb. We find that deeply bound Tbb does not emerge when employing only meson-meson operators, where each meson is separately momentum projected, while the deeply bound state emerges after adding local diquark antidiquark operators.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM-FIELD THEORIES; ASTERISK; T cc = ccu <overline> |
| Subjects: | 500 Science > 520 Astronomy & allied sciences 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Jul 2026 06:40 |
| Last Modified: | 16 Jul 2026 06:40 |
| URI: | https://pred.uni-regensburg.de/id/eprint/67020 |
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