Evidence for diquarks in lattice QCD

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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.
Version as published in Phys. Rev. Lett.97, 222002,2006; 4 pages, 5 figures

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High Energy Physics - Lattice, Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/176306

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-lat/0609004
 http://arxiv.org/abs/hep-lat/0609004
 Phys.Rev.Lett.97:222002,2006
 doi:10.1103/PhysRevLett.97.222002

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