On the sign of the pi-rho-omega coupling constant

Abstract

It is shown that the relative sign between the $NN\omega$ and $\pi \rho \omega$ coupling constants can be determined most sensitively from $\omega$ production processes in $NN$ collisions. Recent data on these reactions clearly favor the sign of the $\pi \rho \omega$ coupling constant which is opposite to that inferred from studies of the photoproduction reaction in combination with the vector meson dominance assumption and used by many authors. Implication of this finding in the description of other reactions is discussed.

arXiv comment6 pages, 4 figures, REVTeX, to be published in Phys. Lett. B

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• Dynamical Coupled-Channel Model of $\pi N$ Scattering in the W $\le$ 2 GeV Nucleon Resonance Region
• Pion in the Holographic Model with 5D Yang-Mills Fields
• Systematic study of the pp -> pp omega reaction
• Exclusive production of $\omega$ meson in proton-proton collisions at high energies
• Nucleon resonances in $\gamma p\to \omega p$ reaction
• Exclusive diffractive photon bremsstrahlung at the LHC
• Exclusive $f_1(1285)$ meson production for energy ranges available at the GSI-FAIR with HADES and PANDA
• Chiral constraints on the isoscalar electromagnetic spectral functions of the nucleon from leading order vector meson couplings
• Decay behavior of hidden-strange hadronic molecular state $N(2270)$