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Study of the gp-->etap reaction with the Crystal Ball detector at the Mainz Microtron(MAMI-C)
- Source :
- Phys.Rev.C82:035208,2010
- Publication Year :
- 2010
-
Abstract
- The gp-->etap reaction has been measured with the Crystal Ball and TAPS multiphoton spectrometers in the energy range from the production threshold of 707 MeV to 1.4 GeV (1.49 =< W >= 1.87 GeV). Bremsstrahlung photons produced by the 1.5-GeV electron beam of the Mainz Microtron MAMI-C and momentum analyzed by the Glasgow Tagging Spectrometer were used for the eta-meson production. Our accumulation of 3.8 x 10^6 gp-->etap-->3pi0p-->6gp events allows a detailed study of the reaction dynamics. The gp-->etap differential cross sections were determined for 120 energy bins and the full range of the production angles. Our data show a dip near W = 1680 MeV in the total cross section caused by a substantial dip in eta production at forward angles. The data are compared to predictions of previous SAID and MAID partial-wave analyses and to thelatest SAID and MAID fits that have included our data.<br />Comment: 15 pages, 12 figures
Details
- Database :
- arXiv
- Journal :
- Phys.Rev.C82:035208,2010
- Publication Type :
- Report
- Accession number :
- edsarx.1007.0777
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevC.82.035208