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An analysis of the reaction pp --> ppeta near threshold | | K. Nakayama
; J. Haidenbauer
; C. Hanhart
; J. Speth
; | | Date: |
21 Feb 2003 | | Journal: | Phys.Rev. C68 (2003) 045201 | | Subject: | nucl-th | | Abstract: | It is shown that most of the available data on the $pp o ppeta$ reaction, including the invariant mass distributions in the $pp o ppeta$ reaction recently measured at COSY, can be understood in terms of the partial-wave amplitudes involving final $pp$ $S$ and $P$ states and the $eta$ meson s-wave. This finding, together with the fact that results within a meson--exchange model are especially sensitive to the details of the excitation mechanism of the $S_{11}(1535)$ resonance, demonstrates the possibility of investigating the properties of this resonance in $NN$ collisions. The spin correlation function $C_{xx}$ is shown to disentangle the $S$- and $P$-wave contributions. It is also argued that spin correlations may be used to help constrain the contributions of the amplitudes corresponding to the final $pp$ $^3P_0$ | | Source: | arXiv, nucl-th/0302061 | | Services: | Forum | Review | PDF | Favorites | |
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