Antiheavy-Antiheavy-Light-Light Four-Quark Bound States

2022/11/02 by Martin Pflaumer, Pflaumer, Martin, Constantia Alexandrou +9
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2211.00951

openalex publication_date 2022/11/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present our recent results on antiheavy-antiheavy-light-light tetraquark systems using lattice QCD. Our study of the bbus four-quark system with quantum numbers J^P=1⁺ and the bcud four-quark systems with I(J^P)=0(0⁺) and I(J^P)=0(1⁺) utilizes scattering operators at the sink to improve the extraction of the low-lying energy levels. We found a bound state for bbus with E_\textrmbind,bbus = (-86 ± 22 ± 10) \textrmMeV , but no indication for a bound state in both bcud channels. Moreover, we show preliminary results for bbud with I(J^P)=0(1⁺) , where we used scattering operators both at the sink and the source. We found a bound state and determined its infinite-volume binding energy with a scattering analysis, resulting in E_\textrmbind,bbud =(-103 ± 8 ) \textrmMeV .

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