Isospin-breaking effects in the three-pion contribution to hadronic vacuum polarization

• Published in: The journal of high energy physics Vol. 2023; no. 8; pp. 208 - 31
• Main Authors: Hoferichter, Martin, Hoid, Bai-Long, Kubis, Bastian, Schuh, Dominic
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 30.08.2023; Springer Nature B.V; Springer Nature; SpringerOpen
• Subjects: Chiral Lagrangian; Classical and Quantum Gravitation; Elementary Particles; High energy physics; Magnetic moments; Physics; Physics and Astronomy; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Pions; Polarization; Precision QED; Quantum chromodynamics; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Radiation; Regular Article - Theoretical Physics; Relativity Theory; String Theory; Theoretical physics; Vector mesons; Chiral Lagrangian; Precision QED

A bstract Isospin-breaking (IB) effects are required for an evaluation of hadronic vacuum polarization at subpercent precision. While the dominant contributions arise from the e + e − → π + π − channel, also IB in the subleading channels can become relevant for a detailed understanding, e.g., of the...