Quenching effects in strong penguin contributions to ε′/ε

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Quenching effects in strong penguin matrix elements are investigated. A lattice determination of αqNS, the constant that appears in the quenched ChPT relevant for the lattice analysis of K → ππ matrix elements, shows that this constant is large. The original RBC analysis of Q6 matrix elements is revisited in light of this result. Also, the numerical effects of choosing the singlet Golterman-Pallante method of quenching Q6 is investigated.

Original languageEnglish (US)
Pages (from-to)372-374
Number of pages3
JournalNuclear Physics B - Proceedings Supplements
Issue numberSPEC. ISS.
StatePublished - Mar 2005
Externally publishedYes


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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