Evidence for Diquarks in Lattice QCD | Zendy

Constantia Alexandrou | Zendy; Ph. de Forcrand | Zendy; Biagio Lucini | Zendy

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Evidence for Diquarks in Lattice QCD

Author(s) -

Constantia Alexandrou,

Ph. de Forcrand,

Biagio Lucini

Publication year - 2006

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.97.222002

Subject(s) - lattice qcd , physics , lattice (music) , particle physics , quantum chromodynamics , materials science , condensed matter physics , acoustics

Diquarks may play an important role in hadron spectroscopy, baryon decays, and color superconductivity. We investigate the existence of diquark correlations in lattice QCD by considering systematically all the lowest energy diquark channels in a color gauge-invariant setup. We measure mass differences between the various channels and show that the positive parity scalar diquark is the lightest. Quark-quark correlations inside the diquark are clearly seen in this channel, and yield a diquark size of O(1) fm.

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