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Photoproduction of $Lambda(1520)$ hyperons from nuclei near the threshold | | E. Ya. Paryev
; | | Date: |
1 Dec 2011 | | Abstract: | We present a theoretical investigation of $Lambda(1520)$ attenuation in
${gamma}A$ reactions near the threshold. It is performed in the framework of a
collision model based on the nuclear spectral function. The model accounts for
both primary photon-nucleon ${gamma}N o KLambda(1520)$ and secondary
pion-nucleon ${pi}N o KLambda(1520)$ production processes. We calculate the
target mass and momentum dependences of the forward $Lambda(1520)$ hyperon
production from nuclei at photon energy of 2 GeV as well as for two options for
its in-medium width. We find that the considered dependences are markedly
sensitive to this width. Our studies also demonstrate that the secondary
channel ${pi}N o KLambda(1520)$ plays a substantial role in the
intermediate momentum $Lambda(1520)$ photoproduction on nuclei in the chosen
kinematics and, hence, is to be taken into account in the analysis of
$Lambda(1520)$ hyperon photoproduction from nuclei with the aim to get
information on its width in the matter. | | Source: | arXiv, 1112.0153 | | Services: | Forum | Review | PDF | Favorites | |
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