Quark Forces from Hadron Spectroscopy

Abstract

We consider the implications of the most general two-body quark-quark interaction Hamiltonian for the spin-flavor structure of the negative parity L=1 excited baryons. Assuming the most general two-body quark interaction Hamiltonian, we derive two correlations among the masses and mixing angles of these states, which constrain the mixing angles, and can be used to test for the presence of three-body quark interactions. We find that the pure gluon-exchange model is disfavored by data, independently of any assumptions about the hadronic wave functions.

4 pages, 4 figures. Final version to appear in Physical Review Letters

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Cited by in corpus (8)

• QCD and strongly coupled gauge theories: challenges and perspectives
• 1/Nc expansion and the spin-flavor structure of the quark interaction in the constituent quark model
• The Isgur-Karl model revisited
• Operator analysis of effective spin-flavor interactions for L=1 excited baryons
• Configuration Mixing of Quark States in Baryons
• Reveal short range interactions between $u/d$ quarks in the $NN$, $D_{03}$, and $D_{30}$ systems
• Permutation group S_N and hadron spectroscopy
• Exploration of hyperfine interaction between constituent quarks via eta productions