Export citation

Export citation

Choose format for download:

Download Citation

    Pion photoproduction in the Δ(1232) region and chiral bag models

    G. Kälbermann and J. M. Eisenberg

    • Department of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel

    Phys. Rev. D 28, 71 – Published 1 July, 1983

    DOI: https://doi.org/10.1103/PhysRevD.28.71

    Abstract

    We calculate pion photoproduction near the Δ(1232) resonance using a version of the chiral bag model based on an effective Lagrangian that reproduces correct pion-nucleon phenomenology through third order in the pion field. The pionic corrections to the M1 (or M1+) amplitude are common to a broad class of chiral bag models and substantially improve agreement with experiment. We treat also the E2 (or E1+) multipole which is accessible in our approach since the effective Lagrangian induces quark-quark tensor coupling through pion exchange; this in turn permits the admixture of baryon components involving quark excitation to d states. The resulting E2 admixture is consistent with the rather loose bounds set by the present experimental information on this quantity. The present work neglects the tensor force and d state arising from gluon exchange between quarks.

    Authorization Required

    We need you to provide your credentials before accessing this content.

    References (Subscription Required)

    Outline

    Information

    Sign In to Your Journals Account

    Filter

    Filter

    Article Lookup

    Enter a citation