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Evidence for Diquarks in Lattice QCD

Ph. de Forcrand, C. Alexandrou, Biagio Lucini Orcid Logo

Physical Review Letters, Volume: "97", Issue: 22, Start page: 222002

Swansea University Author: Biagio Lucini Orcid Logo

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Abstract

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 difference...

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Published in: Physical Review Letters
ISSN: 0031-9007 1079-7114
Published: 2006
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URI: https://cronfa.swan.ac.uk/Record/cronfa27932
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Abstract: 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 order 1 fm.
College: Faculty of Science and Engineering
Issue: 22
Start Page: 222002