Electromagnetic Corrections to Charged Pion Scattering at Low Energies
classification
✦ hep-ph
keywords
chargedcorrectionselectromagneticscatteringvariationamplitudeapplicationchiral
read the original abstract
The electromagnetic corrections to the low energy scattering amplitude involving charged pions only are investigated at leading and next-to-leading orders in the two-flavour chiral expansion. As an application, the corresponding variation in the strong $2S-2P$ level shift is evaluated. The relative variation is of the order of 5%.
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