Compton scattering of polarized photons on the proton has been investigated in the energy range 0.8-1.5 GeV, where the non-resonance double-pion photoproduction and the excitations of high baryon resonances play an important role among the photoabsorption mechanisms. Data have been collected by the GRAAL facility, whose polarized photon beam is obtained by the backward scattering of laser light onto the ultrarelativistic electrons circulating in the Grenoble's ESRF storage ring. The main background contribution is due to the in-flight decay of pi(0) where the two photons are emitted with a small opening angle. We present some preliminary results about the method for the separation of Compton scattering events from the aforesaid background.
Bartalini, O., Bellini, V., Bocquet, J., Castoldi, M., D'Angelo, A., Didelez, J., et al. (2004). Compton scattering of polarized photons on the proton at GRAAL. In NSTAR 2004: Proceedings of the Workshop on the Physics of Excited Nucleons (pp.303-308). SINGAPORE -- SGP : World Scientific Publishing Co. [10.1142/9789812702272_0035].
Compton scattering of polarized photons on the proton at GRAAL
BARTALINI, ORIETTA;D'ANGELO, ANNALISA;FANTINI, ALESSIA;LAPIK, ALEXANDER;SCHAERF, CARLO;
2004-01-01
Abstract
Compton scattering of polarized photons on the proton has been investigated in the energy range 0.8-1.5 GeV, where the non-resonance double-pion photoproduction and the excitations of high baryon resonances play an important role among the photoabsorption mechanisms. Data have been collected by the GRAAL facility, whose polarized photon beam is obtained by the backward scattering of laser light onto the ultrarelativistic electrons circulating in the Grenoble's ESRF storage ring. The main background contribution is due to the in-flight decay of pi(0) where the two photons are emitted with a small opening angle. We present some preliminary results about the method for the separation of Compton scattering events from the aforesaid background.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
