Nucleonic resonance excitations with linearly polarized photon in $\gamma p\to\omega p$ - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2001

Nucleonic resonance excitations with linearly polarized photon in $\gamma p\to\omega p$

Abstract

In this work, an improved quark model approach to the $\omega$ meson photo-production with an effective Lagrangian is presented. The {\it t}-channel {\it natural}-parity exchange is taken into account through the Pomeron exchange, while the {\it unnatural}-parity exchange is described by the $\pi^0$ exchange. With a very limited number of parameters, the available experimental data in the low energy regime can be consistently accounted for. We find that the beam polarization observables show sensitivities to some {\it s}-channel individual resonances in the $SU(6)\otimes O(3)$ quark model symmetry limit. Especially, the two resonances $P_{13}(1720)$ and $F_{15}(1680)$, which belong to the representation $[{\bf 56, ^2 8}, 2, 2, J]$, have dominant contributions over other excited states. Concerning the essential motivation of searching for "missing resonances" in meson photo-production, this approach provides a feasible framework, on which systematic investigations can be done.
No file

Dates and versions

in2p3-00018216 , version 1 (19-03-2001)

Identifiers

  • HAL Id : in2p3-00018216 , version 1

Cite

Q. Zhao. Nucleonic resonance excitations with linearly polarized photon in $\gamma p\to\omega p$. Physical Review C, 2001, 63, pp.025203-1-025203-10. ⟨in2p3-00018216⟩
5 View
0 Download

Share

Gmail Facebook Twitter LinkedIn More