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New results on the pd --> 3He eta production near threshold

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arxiv hep-ex/0409048 v1 pith:Z7UPLB3K submitted 2004-09-22 hep-ex

classification hep-ex
keywords crossproductionresultssectionstotalalmostangularanisotropic
verification ladder T0 review T1 audit T2 compute T3 formal
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Measurements on the eta meson production in proton-deuteron collisions have been performed using the COSY-11 facility at COSY Juelich. Here we present preliminary results on total and differential cross sections for the pd --> 3He eta reaction at five excess energies between Q = 5.1 and Q = 40.6 MeV. The obtained angular distributions for the emitted eta mesons in the center of mass system expose a transition from an almost isotropic emission to a highly anisotropic distribution. The extracted total cross sections support a strong eta-3He final state interaction and will be compared with model predictions.

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