Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-11-20
Phys.Rev. C71 (2005) 032201
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 4 figs, submitted to PRC rapid comm
Scientific paper
10.1103/PhysRevC.71.032201
We have studied the energy dependence of the $pp$ elastic scattering data and the pion-photoproduction data at 90$^\circ$ c.m. angle in light of the new generalized counting rule derived for exclusive processes. We show that by including the helicity flipping amplitudes (with energy dependence given by the generalized counting rule) and their interference with the Landshoff amplitude, we are able to reproduce the energy dependence of all cross-section and spin-correlation (A$_{NN}$) data available above the resonance region. The pion-photoproduction data can also be described by this approach, but in this case data with much finer energy spacing is needed to confirm the oscillations about the scaling behavior.
Dutta Debabrata
Gao Hui
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