π N scattering and electromagnetic corrections in the perturbative chiral quark model

V. E. Lyubovitskij, Th Gutsche, Amand Faessler, R. Vinh Mau

    Research output: Contribution to journalArticle

    45 Citations (Scopus)

    Abstract

    We apply the perturbative chiral quark model to give predictions for the electromagnetic O(p2) low-energy couplings of the ChPT effective Lagrangian that define the electromagnetic mass shifts of nucleons and first-order (e2) radiative corrections to the π N scattering amplitude. We estimate the leading isospin-breaking correction to the strong energy shift of the π- p atom in the 1s state, which is relevant for the experiment "Pionic Hydrogen" at PSI.

    Original languageEnglish
    Pages (from-to)204-212
    Number of pages9
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume520
    Issue number3-4
    DOIs
    Publication statusPublished - 15 Nov 2001

    Keywords

    • Hadronic atoms
    • Pion-nucleon amplitude
    • Radiative corrections
    • Relativistic chiral quark model

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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