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arXiv · 1611.06601

Long distance part of $ε_K$ from lattice QCD

Ziyuan Bai
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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 $24^3 \times 64$ 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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Ziyuan Bai. 2016-11-20. Long distance part of $ε_K$ from lattice QCD. https://arxiv.org/abs/1611.06601

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