Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-10-09
Phys.Rev.D79:014503,2009
Physics
High Energy Physics
High Energy Physics - Lattice
22 pages, 9 figures
Scientific paper
10.1103/PhysRevD.79.014503
The observed mass pattern of scalar resonances below 1 GeV gives preference to the tetraquark assignment over the conventional $\bar qq$ 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~T/2. We find no indication for light tetraquarks at our range of pion masses 344-576 MeV.
Mohler Daniel
Prelovsek Sasa
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