Chiral Lagrangians for Baryons coupled to massive Spin-1 Fields

Details Chiral Lagrangians for Baryons coupled to massive Spin-1 Fields Chiral Lagrangians for Baryons coupled to massive Spin-1 Fields

1995-11-15

arxiv.org/abs/hep-ph/9511320v1

Int.J.Mod.Phys. A11 (1996) 5183

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pp, LaTeX, uses epsf and elsart12.sty, 3 figures in separate self-unpacking file

Scientific paper

We analyze the effective low--energy field theory of Goldstone bosons and baryons chirally coupled to massive spin--1 fields. We use the electromagnetic baryon form factors to demonstrate the formal equivalence between the vector and the tensor field formulation for the spin--1 fields. We also discuss the origin of the so--called Weinberg term in pion--nucleon scattering and the role of $\rho$--meson exchange. Chirally coupled vector mesons do not give rise to this two--pion nucleon seagull interaction but rather to higher order corrections. Some problems of the formal equivalence arising in higher orders and related to loops are touched upon.

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