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.
Workshop on Physics of Excited Nucleons (NSTAR2004)
Grenoble, France
Rilevanza internazionale
contributo
2004
2004
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
BGO CALORIMETER
http://www.worldscientific.com/doi/abs/10.1142/9789812702272_0035
Intervento a convegno
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].
Bartalini, O; Bellini, V; Bocquet, J; Castoldi, M; D'Angelo, A; Didelez, J; Di Salvo, R; Fantini, A; Guisa, A; Gervino, G; Ghio, F; Girolami, B; Guida...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/96754
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