Tetraquarks: relativistic corrections and other issues
Keywords:Exotic hadrons, quark model, multiquark states, relativistic kinematics, four-body problem
We discuss the effect of relativistic kinematics on the binding energy of multiquark states. For a given potential, the use of relativistic kinematics lowers the energy by a larger amount for the threshold made of two mesons than for a tetraquark, so that its binding is weakened. Some other issues associated with exotic hadrons are also briefly discussed.
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