2008/10/09 by Saša Prelovšek, Sasa Prelovsek, Daniel Mohler · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph
paper · pdf · doi:10.1103/physrevd.79.014503
published as Phys.Rev.D79:014503,2009 · 22 pages, 9 figures
arxiv created 2008/10/09 · openalex publication_date 2009/01/07 · arxiv updated 2010/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The observed mass pattern of scalar resonances below 1 GeV suggests a tetraquark assignment over the conventional qq assignment for these states. We present a search for tetraquarks with isospins 0, 1/2, 1 in lattice QCD, where the isospin channels 1/2 and 1 have not been studied before. We determine three energy levels in each isospin channel using the variational method. The scattering states and possible tetraquark states are distinguished by considering the volume dependence of spectral weights and by considering the time dependence of correlators near t\ensuremath≃T/2. We find no indication for light tetraquarks at our range of pion masses, 344--576 MeV. However, our simulation does not exclude a possibility of finding tetraquarks in a simulation with smaller pion masses or a different interpolator basis.