Quenching effects in strong penguin contributions to $ε'/ε$

Details Quenching effects in strong penguin contributions to $ε'/ε$ Quenching effects in strong penguin contributions to $ε'/ε$

2004-09-17

arxiv.org/abs/hep-lat/0409113v1

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, talk presented at Lattice2004(weak), Fermilab, June 21-26, 2004

Scientific paper

10.1016/j.nuclphysbps.2004.11.27

Quenching effects in strong penguin matrix elements are investigated. A lattice determination of $\alpha_q^{NS}$, the constant that appears in the quenched ChPT relevant for the lattice analysis of $K\to\pi\pi$ matrix elements, shows that this constant is large. The original RBC analysis of $Q_6$ matrix elements is revisited in light of this result. Also, the numerical effects of choosing the singlet Golterman-Pallante method of quenching $Q_6$ is investigated.

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