2018/12/28 by Yiming Cai, Zohreh Davoudi, Cai, Yiming +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1812.11015
openalex publication_date 2018/12/28 · openalex created_date 2022/08/01 · openalex updated_date 2026/07/28
A precise SM prediction for the direct CP violation in the K → ππ decay process is of great importance in confronting experiments and constraining new physics. The state-of-art lattice QCD study of this process will soon achieve a precision that QED effects can no longer be neglected. The inclusion of QED in such calculations is planned, and the formalism to relate the finite-volume matrix element obtained from these calculations to the physical amplitude is underway. Here, we report on the progress towards an extension of the Lellouch-Lüscher formalism in presence of QED, with the goal of enabling the extraction of physical amplitudes for the K→ ππ process with charged initial and/or final states.