1997/02/28 by John F. Donoghue, Fabrizio Gabbiani · 1 citation
Chemistry · Physics and Astronomy · #Chemistry #Chiral perturbation theory #Context (archaeology) #Crystallography #High-Energy Particle Collisions Research #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.56.1605
published as Phys.Rev. D56 (1997) 1605-1611 · Some misprints corrected, results unchanged. 12 pages, 7 eps figures. Version accepted for publication on Phys, Rev. D. LaTeX, uses epsf.sty and rotate.sty
arxiv created 1997/06/17 · openalex publication_date 1997/08/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The decay KL\ensuremath→\ensuremathπ0\ensuremathγe+e^\ensuremath- occurs at a higher rate than the nonradiative process KL\ensuremath→\ensuremathπ0e+e^\ensuremath-, and hence can be a background to CP violation studies using the latter reaction. It also has interest in its own right in the context of chiral perturbation theory, through its relation to the decay KL\ensuremath→\ensuremathπ0\ensuremathγ\ensuremathγ. The leading order chiral loop contribution to KL\ensuremath→\ensuremathπ0\ensuremathγe+e^\ensuremath-, including the (q_e++q_e^\ensuremath-)2/m_\ensuremathπ2 dependence, is completely calculable. We present this result and also include the higher order modifications which are required in the analysis of KL\ensuremath→\ensuremathπ0\ensuremathγ\ensuremathγ.