Eigenvalue Decomposition of Meson Correlators

Details Eigenvalue Decomposition of Meson Correlators Eigenvalue Decomposition of Meson Correlators

2003-10-27

arxiv.org/abs/hep-ph/0310303v1

Phys.Rev. D69 (2004) 074024

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, Revtex, 7 postscript figures

Scientific paper

10.1103/PhysRevD.69.074024

Euclidean space hadronic correlators are computed in quenched QCD at small quark mass using truncations of quark propagators which include or exclude low eigenvalue eigenmodes of the Dirac operator. High modes provide the dominant contribution to parity averaged correlators, especially at short distances. Differences of correlators of opposite parity receive most of their contributions from low modes and are much smaller in size than parity averages at short distances. The pion propagator in any correlator to which it couples receives a large contribution from low modes, while the tensor meson correlator receives a tiny contribution from low eigenmodes.

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