pi pi Phase shifts from K to 2 pi

2008/07/31 by Vincenzo Cirigliano, C. Gatti, Cirigliano, V. +5
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.0807.5128

openalex publication_date 2008/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We update the numerical results for the s-wave pi pi scattering phase-shift difference delta₀⁰ - delta₀² at s = m_K² 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⁺ pi⁰ decay widths and include experimental correlations.

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