b ¯ b ¯ u d and b ¯ b ¯ u s tetraquarks from lattice QCD using symmetric correlation matrices with both local and scattering interpolating operators
Year: 2024
Type: article
Abstract: We study the b ¯ b ¯ u d tetraquark with quantum numbers I ( J P ) = 0 ( 1 + ) as well as the b ¯ b ¯ u s tetraquark with quantum numbers J P = 1 + using lattice QCD. We improve on existing work by including both local and scattering interpolating operators on both sides of the correlation functions and use symmetric correlation matrices. This allows not only a reliable determination of the energies of QCD-stable tetraquark ground states, but also of low-lying excited states, which are meson-meson scattering states. The latter is particularly important for future finite-volume scattering analyses. Here, we perform chiral and continuum extrapolations of just the ground-state energies, for which finite-volume effects are expected to be small. Our resulting tetraquark binding energies, − 100 ± 10 − 51 + 36 MeV for b ¯ b ¯ u d and − 30 ± 3 − 31 + 11 MeV for b ¯ b ¯ u s , are consistent with other recent lattice-QCD predictions. Published by the American Physical Society 2024
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: European High Performance Computing Joint Undertaking, National Science Foundation, U.S. Department of Energy, National Energy Research Scientific Computing Center, European Commission, Deutsche Forschungsgemeinschaft, Partnership for Advanced Computing in Europe AISBL, Hessisches Ministerium für Wissenschaft und Kunst, China Scholarship Council, Research and Innovation Foundation, Office of Science, European Regional Development Fund, High Energy Physics
Awards: G122673668, G1286236842, G1604632246, G1677143136, G1863003419, G3083819904, G3226045097, G3562095311, G3685081974, XSEDE 2.0: Integrating, Enabling and Enhancing National Cyberinfrastructure with Expanding Community Involvement, GitterQCDUntersuchung einer bbar bbar u d TetraquarkResonanz, G419881185, G42916606, G4382344593, G4501827968, G498139845, G5004414462, G5076365615, G526230902, G5590740066, Exotische Mesonen mit GitterQCD, G6104540350, G6337622905, Coordination and Support for National Competence Centres on a European Level, G6806689448, G7048133551, G7225816264, PRACE 6th Implementation Phase Project, Unraveling the 3D parton structure of the nucleon with lattice QCD, G759921648, G8369870056, G8866302460, UNIVERSITY OF ARIZONA HIGH ENERGY PHYSICS PROGRAM, G969889393
OpenAlex ID: W4402576158