The only recent eta' photoproduction data off proton available in literature are the differential and total cross sections published by the CLAS and CB-ELSA-TAPS Collaborations. However, the wide information about reaction cross sections are not sufficient to understand the role of resonances involved in the process. Different theoretical works stressed the importance to measure also polarization observables in order to solve the ambiguities in the choice of the parameters used in their models. We present the analysis of eta' photoproduction off the proton analysis, identifying the investigated meson by the pi(+)pi(-)eta, pi(0)pi(0)eta, and gamma gamma decay modes by using the GRAAL apparatus; and we show the preliminary GRAAL results on the beam asymmetry Sigma at beam energy of 1475 MeV.
Mandaglio, G., Bellini, V., Bocquet, J.p., Capogni, M., Curciarello, F., D'Angelo, A., et al. (2014). Beam asymmetry Σ in η′ photoproduction off the proton at the GRAAL experiment. EPJ WEB OF CONFERENCES, 73, 04006 [10.1051/epjconf/20147304006].
Beam asymmetry Σ in η′ photoproduction off the proton at the GRAAL experiment
D'Angelo, A.Membro del Collaboration Group
;Fantini, A.;Franco, D.Membro del Collaboration Group
;Schaerf, C.;Vegna, V.;Zonta, I.
2014-01-01
Abstract
The only recent eta' photoproduction data off proton available in literature are the differential and total cross sections published by the CLAS and CB-ELSA-TAPS Collaborations. However, the wide information about reaction cross sections are not sufficient to understand the role of resonances involved in the process. Different theoretical works stressed the importance to measure also polarization observables in order to solve the ambiguities in the choice of the parameters used in their models. We present the analysis of eta' photoproduction off the proton analysis, identifying the investigated meson by the pi(+)pi(-)eta, pi(0)pi(0)eta, and gamma gamma decay modes by using the GRAAL apparatus; and we show the preliminary GRAAL results on the beam asymmetry Sigma at beam energy of 1475 MeV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
