Symmetries of higher-spin fields and the electromagnetic N-N(1680) form factors

Details Symmetries of higher-spin fields and the electromagnetic N-N(1680) form factors Symmetries of higher-spin fields and the electromagnetic N-N(1680) form factors

2010-06-20

arxiv.org/abs/1006.3929v1

Phys.Rev.C82:045204,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pp., 2 figs

Scientific paper

10.1103/PhysRevC.82.045204

We study the Q^2-evolution of the form factors (FFs) for the nucleon-to-N(1680) transition in the framework of an effective field theory. To this end, the intrinsic symmetries of the spin-5/2 Rarita-Schwinger (RS) fields are analyzed, and a Lagrangian of the electromagnetic N-N(1680) interactions is constructed. The Lagrangian preserves all the intrinsic symmetries of the spin-5/2 field--point and gauge invariance--and does not involve lower-spin components of the reducible RS field. Besides, the symmetries postulate the definitions of the Lagrangian FFs. These FFs are modeled as dispersionlike expansions in a vector-meson--dominance model. A good agreement with the experimental data is achieved.

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