Covariant L-S Scheme for the effective N*NM couplings

Details Covariant L-S Scheme for the effective N*NM couplings Covariant L-S Scheme for the effective N*NM couplings

2002-10-10

arxiv.org/abs/hep-ph/0210164v1

Phys.Rev. C67 (2003) 015204

Physics

High Energy Physics

High Energy Physics - Phenomenology

Postscript file, 14 pages

Scientific paper

10.1103/PhysRevC.67.015204

For excited nucleon states $N^*$ of arbitrary spin coupling to nucleon (N) and meson (M), we propose a Lorentz covariant orbital-spin (L-S) scheme for the effective $N^*NM$ couplings. To be used for the partial wave analysis of various $N^*$ production and decay processes, it combines merits of two conventional schemes, {\sl i.e.}, covariant effective Lagrangian approach and multipole analysis with amplitudes expanded according to angular momentum L. As examples, explicit formulae are given for $N^*\to N\pi$, $N^*\to N\omega$ and $\psi\to N^*\bar N$ processes which are under current experimental studies.

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