On Lattice Computations of K+ --> pi+ pi0 Decay at m_K =2m_pi

Details On Lattice Computations of K+ --> pi+ pi0 Decay at m_K =2m_pi On Lattice Computations of K+ --> pi+ pi0 Decay at m_K =2m_pi

1998-05-29

arxiv.org/abs/hep-lat/9805032v1

Phys.Rev. D58 (1998) 097503

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages, revtex

Scientific paper

10.1103/PhysRevD.58.097503

We use one-loop chiral perturbation theory to compare potential lattice
computations of the K+ --> pi+ pi0 decay amplitude at m_K=2m_pi with the
experimental value. We find that the combined one-loop effect due to this
unphysical pion to kaon mass ratio and typical finite volume effects is still
of order minus 20-30%, and appears to dominate the effects from quenching.

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