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Evidence for diquarks in lattice QCD

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arxiv hep-lat/0609004 v2 pith:NW4PQFGQ submitted 2006-09-05 hep-lat nucl-th

C. Alexandrou (Univ. of Cyprus) , Ph. de Forcrand (CERN & ETH Zurich) , B.Lucini (Univ. of Swansea) This is my paper · ORCID
classification hep-latnucl-th
keywords diquarkchannelscolorcorrelationsdiquarkslatticebaryonchannel
verification ladder T0 review T1 audit T2 compute T3 formal
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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.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Scalar diquark mass and quark--diquark potential from lattice QCD using the potential method with a static quark

    hep-lat 2026-06 unverdicted novelty 5.0 of 10

    Using lattice QCD, the scalar diquark mass is found to be close to (2/3) of the nucleon mass, and the quark-diquark potential is of Cornell type with string tension agreeing to within 5% of the static quark-antiquark ...

  2. Short-Range Correlations Between Partons in a Proton

    hep-ph 2026-06 unverdicted novelty 5.0 of 10

    Proposes EIC jet-pion-electron measurements to detect and quantify short-range quark pair correlations in protons, expecting ud pairs to dominate due to diquark attraction.

  3. Chiral effective theory of scalar and vector diquarks revisited

    hep-ph 2024-11 conditional novelty 5.0 of 10

    A new term in the chiral diquark Lagrangian is shown to control the mass ordering of pseudoscalar diquarks and to set the threshold at which heavy-baryon decays turn off under chiral restoration.

  4. Lattice perspectives on doubly heavy tetraquarks

    hep-lat 2025-02 accept novelty 1.0 of 10

    A review of lattice QCD results concludes that doubly heavy tetraquarks Tbb(ud/us) are firmly predicted as bound states, Tcc appears as a virtual state at nonphysical masses, and Tbc is under active study.

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