arXiv:0807.5128·v1·High Energy Physics — Phenomenology
pi pi Phase shifts from K to 2 pi
V. Cirigliano🇺🇸 · C. Gatti · M. Moulson · M. Palutan (for the FlaviaNet Kaon Working Group)
Abstract
We update the numerical results for the s-wave pi pi scattering phase-shift difference delta_0^0 - delta_0^2 at s = m_K^2 from a previous study of isospin breaking in K to 2 pi amplitudes in chiral perturbation theory. We include recent data for the K_S to pi pi and K^+ to pi^+ pi^0 decay widths and include experimental correlations.
Comments: 6 pages