Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-11-14
Phys.Rev. D55 (1997) 7075-7092
Physics
High Energy Physics
High Energy Physics - Phenomenology
40 pages, Latex, needs axodraw. and psfig. macros, 4 figures
Scientific paper
10.1103/PhysRevD.55.7075
We use the Cottingham method to calculate the pion and kaon electromagnetic mass differences with as few model dependent inputs as possible. The constraints of chiral symmetry at low energy, QCD at high energy and experimental data in between are used in the dispersion relation. We find excellent agreement with experiment for the pion mass difference. The kaon mass difference exhibits a strong violation of the lowest order prediction of Dashen's theorem, in qualitative agreement with several other recent calculations.
Donoghue John F.
Perez Antonio F.
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