O(m_d-m_u) Effects in CP-even and CP-odd K-->pi pi Decays

K. Maltman (1) , C.E. Wolfe (2) ((1) Math , Stats , York Univ. , Toronto , Canada; CSSM , Univ. of Adelaide , Adelaide

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Australia (2) Nuclear Theory Center Indiana Univ. Bloomington Indiana USA)

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classification ✦ hep-ph

keywords cp-evencp-odddecayseffectsepsilonchiralcomputedcontribution

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Strong isospin-breaking (IB) effects in CP-even and CP-odd K-->pi pi decays are computed to next-to-leading order (NLO) in the chiral expansion. The impact of these corrections on the magnitude of the Delta I=1/2 Rule and on the size of the IB correction, Omega_IB, to the gluonic penguin contribution to epsilon'/epsilon are discussed.

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O(m_d-m_u) Effects in CP-even and CP-odd K-->pi pi Decays

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