Lattice Approach to Threshold States
نویسنده
چکیده
I review lattice QCD results relevant to the recently discovered hadrons: X(3782), Y (4260), and Ds(2317), because these seem, to me at least, to be the most interesting states from the perspective of solving and understanding QCD . The physical picture behind lattice QCD calculations is that an interpolating operator creates a hadron in the QCD vacuum. and after a specific time interval the hadron is destroyed. The choice of interpolating operator is particularly important for hadrons that are thought to be a hybrid meson or a molecule of hadrons. For example, for a 1−− state in the charmonium system, possible interpolating operators are
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