π- p atom in ChPT

Strong energy-level shift

V. E. Lyubovitskij, A. Rusetsky

    Research output: Contribution to journalArticle

    74 Citations (Scopus)

    Abstract

    The general formula of the π- p atom strong energy-level shift in the 1s state is derived in the next-to-leading order in the isospin breaking, and in all orders in chiral expansion. Isospin-breaking corrections to the level shift are explicitly evaluated at order p2 in ChPT. The results clearly demonstrate the necessity to critically reaccess the values of the π N scattering lengths, extracted from the energy-level shift measurement by means of the potential model-based theoretical analysis. (C) 2000 Elsevier Science B.V.

    Original languageEnglish
    Pages (from-to)9-18
    Number of pages10
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume494
    Issue number1-2
    DOIs
    Publication statusPublished - 23 Nov 2000

    Fingerprint

    energy levels
    shift
    atoms
    expansion
    scattering

    Keywords

    • Chiral Perturbation Theory
    • Hadronic atoms
    • Non-relativistic effective Lagrangians

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    π- p atom in ChPT : Strong energy-level shift. / Lyubovitskij, V. E.; Rusetsky, A.

    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 494, No. 1-2, 23.11.2000, p. 9-18.

    Research output: Contribution to journalArticle

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