Diquark correlations in baryons on the lattice with overlap quarks
Ronald Babich (Boston University), Nicolas Garron (DESY Zeuthen),, Christian Hoelbling (Universitaet Wuppertal), Joseph Howard (Boston, University), Laurent Lellouch (CPT Marseille), Claudio Rebbi (Boston, University)
TL;DR
This paper investigates diquark correlations within baryons using lattice QCD with overlap quarks, revealing enhanced scalar diquark correlations consistent with quark model predictions.
Contribution
It provides the first lattice QCD evidence for scalar diquark correlations in baryons and compares different diquark channels using overlap fermions.
Findings
Enhanced scalar diquark correlation observed
Comparison of diquark masses in different gauges
Supports quark model predictions
Abstract
We evaluate baryon wave functions in both the Coulomb and Landau gauge in lattice QCD. These are constructed from quark propagators calculated with the overlap Dirac operator on quenched gauge configurations at beta = 6. By comparing baryon states that differ in their diquark content, we find evidence for enhanced correlation in the scalar diquark channel, as favored by quark models. We also summarize earlier results for diquark masses in the Landau gauge, casting them in a form more easily compared with subsequent studies.
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