Long distance part of ε_K from lattice QCD

2016/11/20 by Ziyuan Bai, Bai, Ziyuan
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #hep-lat

paper · pdf · doi:10.48550/arxiv.1611.06601

7 pages, 3 figures. proceeding for 34th International Symposium on Lattice Field Theory

arxiv created 2016/11/20 · arxiv updated 2016/11/22

Abstract

We demonstrate the lattice QCD calculation of the long distance contribution to ε_K. Due to the singular, short-distance structure of ε_K, we must perform a short-distance subtraction and introduce a corresponding low-energy constant determined from perturbation theory, which we calculate at Next Leading Order (NLO). We perform the calculation on a 24³ × 64 lattice with a pion mass of 329 MeV. This work is a complete calculation, which includes all connected and disconnected diagrams.

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