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Electromagnetic corrections to $\pi ^{-}$p scattering length from pionic hydrogen
We derive a closed, model space independent, expression for the electromagnetic correction factor $\delta $ to the scattering length $a$ extracted from a hydrogenic atom with an extended charge to order $\alpha ^2$ and $a^3$ in the limit of a short ranged hadronic interaction.
| Autores principales: | , , |
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| Lenguaje: | eng |
| Publicado: |
2002
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/S0375-9474(03)01145-X http://cds.cern.ch/record/593889 |