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# Electromagnetic corrections to $\pi^-$p scattering length from pionic hydrogen

Abstract : 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.
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Conference papers
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http://hal.in2p3.fr/in2p3-00192265
Contributor : Dominique Girod <>
Submitted on : Tuesday, November 27, 2007 - 2:13:30 PM
Last modification on : Thursday, December 10, 2020 - 10:50:40 AM

### Citation

T. E. O. Ericson, B. Loiseau, S. Wycech. Electromagnetic corrections to $\pi^-$p scattering length from pionic hydrogen. PANIC'02: 16th International Conference on Particles and Nuclei, Sep 2002, Osaka, Japan. pp.C653-C656, ⟨10.1016/S0375-9474(03)01145-X⟩. ⟨in2p3-00192265⟩

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