Partial decay widths of baryons in the spin-momentum operator expansion method

Abstract

The cross sections for photo- and pion-induced production of baryon resonances and their partial decay widths to the two--body and multi--body final states are calculated in the framework of the operator expansion method. The approach is fully relativistic invariant, and it allows us to perform combined analyses of different reactions imposing directly the analyticity and unitarity constraints. All formulae are given explicitly in the form used by the Crystal Barrel collaboration in the partial wave analysis.

15 pages, 6 figures

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• New data on $\vec{\gamma }\vec{p}\to \eta p$ with polarized photons and protons and their implications for $N^{\ast }\to N\eta$ decays
• Photoproduction of Neutral Pions off Protons
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• Analysis of pion production data measured by HADES in proton-proton collisions at 1.25 GeV
• Hyperon I: Partial wave amplitudes for $K^{-}p$ scattering
• Determination of N* amplitudes from associated strangeness production in p+p collisions
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• Measurement of the beam asymmetry $\Sigma$ and the target asymmetry $T$ in the photoproduction of $\omega$ mesons off the proton using CLAS at Jefferson Laboratory
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• Combined Partial Wave Analysis for the description of exclusive $p+p\to p+K^{+}+\Lambda$ production