Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1851433 | Physics Letters B | 2008 | 6 Pages |
Abstract
The ppâ{pp}sÏ0 differential cross section has been measured with the ANKE spectrometer at COSY-Jülich for seven proton beam energies Tp between 0.51 and 1.97 GeV. By selecting proton pairs with an excitation energy of less than 3 MeV it is ensured that the final {pp}s system is in the S01 state. In the measured region of θppcmâ²18°, the data reveal a forward dip for Tp⩽1.4 GeV whereas a forward peaking is seen at 1.97 GeV. The energy dependence of the forward cross section shows a broad peak in the 0.6-0.8 GeV region, probably associated with Î(1232) excitation, and a minimum at 1.4 GeV. Some of these features are similar to those observed for the spin-isospin partner reaction, ppâdÏ+. However, the ratio of the forward differential cross sections of the two reactions shows a significant suppression of single pion production associated with a spin-singlet final nucleon pair.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
V. Kurbatov, M. Büscher, S. Dymov, D. Gusev, M. Hartmann, A. Kacharava, A. Khoukaz, V. Komarov, A. Kulikov, G. Macharashvili, T. Mersmann, S. Merzliakov, S. Mikirtytchiants, D. Prasuhn, F. Rathmann, R. Schleichert, H. Ströher, D. Tsirkov, S. Yaschenko,