Precision study of the d+p->3He+eta reaction for excess energies between 20 and 60 MeV

Details Precision study of the d+p->3He+eta reaction for excess energies between 20 and 60 MeV Precision study of the d+p->3He+eta reaction for excess energies between 20 and 60 MeV

2009-05-28

arxiv.org/abs/0905.4595v1

Phys.Rev.C80:017001,2009

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 4 figures, 1 table

Scientific paper

10.1103/PhysRevC.80.017001

The differential and total cross sections for the d+p->3He+eta reaction have been measured at COSY-ANKE at excess energies of 19.5, 39.4, and 59.4 MeV over the full angular range. The results are in line with trends apparent from the detailed near-threshold studies and also agree with those from CELSIUS, though the present data have higher precision. While at 19.5 MeV the results can be described in terms of s- and p-wave production, by 59.4 MeV higher partial waves are required. Including the 19.5 MeV point together with the near-threshold data in a global s- and p-wave fit gives a poorer overall description of the data though the position of the pole in the 3He scattering amplitude, corresponding to the quasi-bound or virtual state, is hardly changed.

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