2025/08/14 by L. A. Heuser, Heuser, L. A., A. Reyes-Torrecilla +11 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · doi:10.48550/arxiv.2508.10989
openalex publication_date 2025/08/14 · openalex created_date 2026/04/02 · openalex updated_date 2026/07/28
We utilize the universality of pion-pion (ππ) final-state interactions at small invariant masses to understand the enhanced localized CP violation in B^±→ K^±π+π-, using a dispersive approach. From a fit to the integrated CP-asymmetry data, we successfully predict the Dalitz-plot kinematic distribution of the asymmetry in the low-energy ππ region, including the large localized CP violation recently observed by LHCb. An essential role is played by the contributions of isospin 2. This formalism, whose parameters have a physical meaning, can be adapted straightforwardly to other systems with CP violation enhanced by final-state interactions.