### Abstract

We show that the lattice calculation of K→ππ and ε′ / ε amplitudes for (8,1) and (27,1) operators to O(p ^{4}) in chiral perturbation theory is feasible when one uses K→ππ computations at the two unphysical kinematics allowed by the Maiani-Testa theorem, along with the usual (computable) two- and three-point functions, namely K→0, K→π (with-momentum), and K-K̄. Explicit expressions for the finite logarithms emerging from our O(p ^{4}) analysis to the above amplitudes are also given.

Original language | English (US) |
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Article number | 114020 |

Journal | Physical Review D |

Volume | 65 |

Issue number | 11 |

DOIs | |

State | Published - Dec 1 2002 |

Externally published | Yes |

### ASJC Scopus subject areas

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

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## Cite this

Laiho, J., & Soni, A. (2002). Lattice extraction of K→ππ amplitudes to O(p

^{4}) in chiral perturbation theory.*Physical Review D*,*65*(11), [114020]. https://doi.org/10.1103/PhysRevD.65.114020