Associative photoproduction of Roper resonance and ω meson -: art. no. 055208
| dc.contributor.author | Babacan, H | |
| dc.contributor.author | Babacan, T | |
| dc.date.accessioned | 2024-07-18T11:46:48Z | |
| dc.date.available | 2024-07-18T11:46:48Z | |
| dc.description.abstract | Associative photoproduction of omega meson and N-*(1440) on nucleons, gamma+N-->omega+N-*(1440), in the near threshold region is investigated in a framework employing effective Lagrangians. Besides pi 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 omegaNN(*)(1440) vertex, which are assumed to be equal to the values of these couplings for omegaNN vertex. Using our previous estimation of omegaNN coupling constants obtained from a fit to available experimental data on photoproduction of omega meson in the near threshold region, we produce the necessary numerical predictions for different observables in gamma+N-->omega+N-*(1440). Numerical results show that at low parallel totparallel to dominant contribution comes from t channel pi exchange while the effects of nucleon and N-*(1440) pole terms can be seen at large parallel totparallel to. Our predictions for the differential cross section and beam asymmetry for the processes gamma+N-->omega+N-*(1440), where N is proton and neutron, at E-gamma=2.5 GeV are presented with zero width approximation and also with the inclusion of width effects of N-*(1440). | |
| dc.identifier.issn | 0556-2813 | |
| dc.identifier.other | 1089-490X | |
| dc.identifier.uri | http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/3032 | |
| dc.language.iso | English | |
| dc.publisher | AMER PHYSICAL SOC | |
| dc.subject | VECTOR-MESONS | |
| dc.subject | SUM-RULES | |
| dc.subject | INTERFERENCE MODEL | |
| dc.subject | NUCLEON RESONANCE | |
| dc.subject | NEAR-THRESHOLD | |
| dc.subject | EXCHANGE | |
| dc.subject | BARYONS | |
| dc.subject | POLES | |
| dc.subject | DELTA | |
| dc.title | Associative photoproduction of Roper resonance and ω meson -: art. no. 055208 | |
| dc.type | Article |