In this Brief Report, we clarify a point concerning the power divergence in lattice calculations of Δ/=1/2 K→ππ decay amplitudes. There have been worries that this divergence might show up in the Minkowski amplitudes at MK=Mπ with all the mesons at rest. Here we demonstrate, via an explicit calculation in leading-order chiral perturbation theory, that the power divergence is absent at the above kinematic point, as predicted by CPS symmetry.
|Number of pages||1|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - 1 Jan 2004|