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arXiv · 1410.6607

Non-perturbative Renormalization of Four-Fermion Operators Relevant to $B_K$ with Staggered Quarks

Hwancheol Jeong·Jangho Kim·Jongjeong Kim·Weonjong Lee·Jeonghwan Pak·Sungwoo Park
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Abstract

We present preliminary results of matching factors of the four-fermion operators relevant to $B_K$, which are obtained using the non-perturbative renormalization (NPR) method in the RI-MOM scheme with HYP-smeared improved staggered fermions. We use the MILC asqtad coarse ($a \cong 0.12\,$fm) ensembles with $20^3 \times 64$ geometry and $am_{\ell}/am_s = 0.01/0.05$. We compare NPR results with those of one-loop perturbative matching.

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Hwancheol Jeong, Jangho Kim, Jongjeong Kim, Weonjong Lee, Jeonghwan Pak, Sungwoo Park. 2014-10-31. Non-perturbative Renormalization of Four-Fermion Operators Relevant to $B_K$ with Staggered Quarks. https://arxiv.org/abs/1410.6607

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