RECENT RESULTS FROM GRAAL

Author:

,MORICCIANI D.1,BARTALINI O.23,BELLINI V.45,BOCQUET J. P.6,CASTOLDI M.7,D'ANGELO A.12,DIDELEZ J. P.8,DI SALVO R.1,FANTINI A.12,GERVINO G.9,GIUSA A.410,GHIO F.1112,GIROLAMI B.1112,GUIDAL M.8,HOURANY E.8,KUNNE R.8,KOUZNETSOV V.413,LAPIK A.14,LEVI SANDRI P.3,LLERES A.6,NEDOREZOV D. V.14,REBREYEND D.6,RUDNEV N. V.15,RUSSO G.410,SCHAERF C.12,SPERDUTO M. L.45,SUTERA M. C.410,TURINGE A.13,ZUCCHIATTI A.7

Affiliation:

1. INFN, Sezione Roma II, I-00133 Roma, Italy

2. Università di Roma "Tor Vergata", I-00133 Roma, Italy

3. INFN, Laboratori Nazionali di Frascati, I-00044 Frascati, Italy

4. Università di Catania, I-95123 Catania, Italy

5. INFN, Laboratori Nazionali del Sud, I-95123 Catania, Italy

6. LSCP Grenoble, 38026 Grenoble, France

7. INFN, Sezione di Genova, I-16146 Genova, Italy

8. IPN, 91406 Orsay Cedex, France

9. INFN, Sezione di Torino and Università di Torino, I-10125 Torino, Italy

10. INFN, Sezione di Catania, I-95123 Catania, Italy

11. Istituto Superiore di Sanità, I-00161 Roma, Italy

12. INFN, Sezione Roma1, 00185 Roma, Italy

13. Kurchatov Institute of Atomic Energy, 123182 Moscow, Russia

14. Institute for Nuclear Research, 117312 Moscow, Russia

15. Institute of Theoretical and Experimental Physics, 117259 Moscow, Russia

Abstract

A polarised and tagged [Formula: see text] ray beam is produced at GRAAL by the Compton scattering of laser light on the high energy electron of the ESRF storage ring. We present results on the beam polarisation asymmetries and cross sections in the photoproduction of mesons on hydrogen and deuterium target in the energy region 500-1500 MeV. These very precise results cover the angular range 30°-150°, providing stringent constraints to theoretical models.

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics

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