Study of the 3He-eta system in d-p collisions at COSY-11

Details Study of the 3He-eta system in d-p collisions at COSY-11 Study of the 3He-eta system in d-p collisions at COSY-11

2006-03-23

arxiv.org/abs/nucl-ex/0603023v1

Acta Phys.Slov.56:213-219,2006

Physics

Nuclear Physics

Nuclear Experiment

8 pages; 5 figures; Talk at Eta05 Workshop on Production and Decay of eta and eta-prime Mesons, Cracow, Poland, 15-18 Sep 2005

Scientific paper

We present preliminary results from dp --> 3He X (X=pi0,eta) measurements near the eta production threshold. The data were taken during a slow ramping of the COSY internal deuteron beam scattered on a proton target. The 3He ejectiles were registered with the COSY-11 detection setup. The ongoing data analysis should deliver high precision data for the dp --> 3He eta total and differential cross sections for the excess energies in the range from threshold up to 9 MeV. The preliminary excitation function for the reaction dp --> 3He pi0 does not show any structure which could originate from the decay of 3He-eta bound state. We present also a threshold excitation curve for the dp --> 3He X channel. Contrary to corresponding results from SATURNE we see no cusp in the vicinity of the eta threshold.

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