The analysis of the gamma p ->eta pi(0)p reaction has been performed using data from the GRAAL experiment. The total and differential cross sections and the beam asymmetry have been obtained from threshold up to 1.5 GeV of beam energy. The two resonances S-11(1535) and Delta(1700) are expected to be excited in the intermediate states of this reaction. The results are used to test predictions based on the assumption that both resonances are dynamically generated from the meson-baryon interaction provided by chiral Lagrangians. The term involving the Delta(1700) excitation, followed by the decay into eta Delta(1232), is found to be dominant.
Ajaka, J., Assafiri, Y., Bartalini, O., Bellini, V., Bouchigny, S., Castoldi, M., et al. (2008). Simultaneous photoproduction of eta and pi(0) mesons on the proton. PHYSICAL REVIEW LETTERS, 100(5) [10.1103/PhysRevLett.100.052003].
Simultaneous photoproduction of eta and pi(0) mesons on the proton
D'ANGELO, ANNALISA;FANTINI, ALESSIA;SCHAERF, CARLO;
2008-01-01
Abstract
The analysis of the gamma p ->eta pi(0)p reaction has been performed using data from the GRAAL experiment. The total and differential cross sections and the beam asymmetry have been obtained from threshold up to 1.5 GeV of beam energy. The two resonances S-11(1535) and Delta(1700) are expected to be excited in the intermediate states of this reaction. The results are used to test predictions based on the assumption that both resonances are dynamically generated from the meson-baryon interaction provided by chiral Lagrangians. The term involving the Delta(1700) excitation, followed by the decay into eta Delta(1232), is found to be dominant.| File | Dimensione | Formato | |
|---|---|---|---|
|
Phys_rew_lett_100.pdf
accesso aperto
Dimensione
269.6 kB
Formato
Adobe PDF
|
269.6 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
