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Spatial diquark correlations in a hadron

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arxiv 1012.2353 v1 pith:N3UIAEQU submitted 2010-12-10 hep-lat

Jeremy Green , Michael Engelhardt , John Negele , Patrick Varilly This is my paper · ORCID
classification hep-lat
keywords diquarkcorrelationsquarkstatichadronspatialawaybinding
verification ladder T0 review T1 audit T2 compute T3 formal
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Using lattice QCD, a diquark can be studied in a gauge-invariant manner by binding it to a static quark in a heavy-light-light hadron. We compute the simultaneous two-quark density of a diquark, including corrections for periodic boundary conditions. We define a correlation function to isolate the intrinsic correlations of the diquark and reduce the effects caused by the presence of the static quark. Away from the immediate vicinity of the static quark, the diquark has a consistent shape, with much stronger correlations seen in the good (scalar) diquark than in the bad (vector) diquark. We present results for m_{\pi}=293 MeV in N_f=2+1 QCD as well as m_{\pi}=940 MeV in quenched QCD, and discuss the dependence of the spatial size on the pion mass.

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Cited by 3 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. 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.

  3. 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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