Extracting Electric Polarizabilities from Lattice QCD

Details Extracting Electric Polarizabilities from Lattice QCD Extracting Electric Polarizabilities from Lattice QCD

2009-04-09

arxiv.org/abs/0904.1586v2

Phys.Rev.D79:094505,2009

Physics

High Energy Physics

High Energy Physics - Lattice

17 pages, 6 figures, a few clarifications added, published version

Scientific paper

10.1103/PhysRevD.79.094505

Charged and neutral, pion and kaon electric polarizabilities are extracted from lattice QCD using an ensemble of anisotropic gauge configurations with dynamical clover fermions. We utilize classical background fields to access the polarizabilities from two-point correlation functions. Uniform background fields are achieved by quantizing the electric field strength with the proper treatment of boundary flux. These external fields, however, are implemented only in the valence quark sector. A novel method to extract charge particle polarizabilities is successfully demonstrated for the first time.

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