First measurement of the helicity-dependent (gamma)over-right-arrow(p)over-right-arrow → p eta differential cross-section
European physical journal : A. Bd. 17. H. 2. Berlin: Springer 2003 S. 241 - 244
Erscheinungsjahr: 2003
ISBN/ISSN: 1434-6001 ; 1434-601X
Publikationstyp: Zeitschriftenaufsatz
Sprache: Englisch
Doi/URN: 10.1140/epja/i2002-10153-2
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Inhaltszusammenfassung
The helicity dependence of the (gamma) over right arrow(p) over right arrow -+ peta reaction has been measured for the first time at a center-of-mass angle theta(eta)*= 70degrees in the photon energy range from 780 MeV to 790 MeV. The experiment, performed at the Mainz microtron MAMI, used a 4pi-detector system, a circularly polarized, tagged photon beam. and a longitudinally polarized frozen-spin target. The helicity 3/2 cross-section is found to be small and the results for helicity 1/2 agr...The helicity dependence of the (gamma) over right arrow(p) over right arrow -+ peta reaction has been measured for the first time at a center-of-mass angle theta(eta)*= 70degrees in the photon energy range from 780 MeV to 790 MeV. The experiment, performed at the Mainz microtron MAMI, used a 4pi-detector system, a circularly polarized, tagged photon beam. and a longitudinally polarized frozen-spin target. The helicity 3/2 cross-section is found to be small and the results for helicity 1/2 agree with predictions from the MAID analysis.» weiterlesen» einklappen
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Physik
