Associative photoproduction of Roper resonance and ω meson
| dc.contributor.author | Babacan H. | |
| dc.contributor.author | Babacan T. | |
| dc.date.accessioned | 2024-07-22T08:24:53Z | |
| dc.date.available | 2024-07-22T08:24:53Z | |
| dc.date.issued | 2003 | |
| dc.description.abstract | Associative photoproduction of ω meson and N*(1440) on nucleons, γ+N→ω + N*(1440), in the near threshold region is investigated in a framework employing effective Lagrangians. Besides π exchange in the t channel, baryon exchanges, i.e., N and N* exchanges, in the s and u channels are also taken into account in calculations of differential cross section and beam asymmetry. Important inputs of this model are the vector and tensor coupling constants of ωNN*(1440) vertex, which are assumed to be equal to the values of these couplings for ωNN vertex. Using our previous estimation of ωNN coupling constants obtained from a fit to available experimental data on photoproduction of ω meson in the near threshold region, we produce the necessary numerical predictions for different observables in γ+N→ ω+N*(1440). Numerical results show that at low |t| dominant contribution comes from t channel π exchange while the effects of nucleon and N*(1440) pole terms can be seen at large |t|. Our predictions for the differential cross section and beam asymmetry for the processes γ+N→ω+N*(1440), where N is proton and neutron, at Eγ=2.5 GeV are presented with zero width approximation and also with the inclusion of width effects of N*(1440). | |
| dc.identifier.DOI-ID | 10.1103/PhysRevC.67.055208 | |
| dc.identifier.issn | 05562813 | |
| dc.identifier.uri | http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/20171 | |
| dc.language.iso | English | |
| dc.publisher | American Physical Society | |
| dc.rights | All Open Access; Green Open Access | |
| dc.title | Associative photoproduction of Roper resonance and ω meson | |
| dc.type | Article |