Diquark correlations in a hadron from lattice QCD
Author(s)Green, Jeremy Russell; Engelhardt, M.; Negele, John W.; Varilly, Patrick
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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 heavylight-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 (axial-vector) diquark. We present results for mπ = 293 MeV as well as mπ = 940 MeV, and discuss the behavior as the pion mass changes.
DepartmentMassachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics
Proceedings of the 19th International Conference on Particles and Nuclei (PANIC11)
American Institute of Physics
Green, Jeremy, Michael Engelhardt, John Negele, and Patrick Varilly. "Diquark correlations in a hadron from lattice QCD." In 19th Particles and Nuclei International Conference: PANIC 11, Cambridge, Massachusetts, USA, 24-29 July 2011, edited by Stephen G. Steadman, George S.F. Stephans, Frank E. Taylor. (AIP conference proceedings. High energy physics; 1441), AIP, 2012. © 2012 American Institute of Physics.
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