Lattice extraction of K→ππ amplitudes to O(p 4) in chiral perturbation theory

Jack Laiho, Amarjit Soni

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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 languageEnglish (US)
Article number114020
JournalPhysical Review D
Issue number11
StatePublished - Dec 1 2002


ASJC Scopus subject areas

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

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