Spatial diquark correlations in a hadron

Details Spatial diquark correlations in a hadron Spatial diquark correlations in a hadron

2010-12-10

arxiv.org/abs/1012.2353v1

PoS(Lattice 2010)140

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 5 figures. Talk presented at the XXVIII International Symposium on Lattice Field Theory (Lattice 2010), June 14-19, 2

Scientific paper

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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