Abstract
The differential and total cross sections for the 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 largely agree with those from CELSIUS, though the present data have much better angular coverage near the forward and backward directions, thus allowing firmer conclusions to be drawn. While at 19.5 MeV the results can be described in terms of - and -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 - and -wave fit gives a poorer overall description of the data though the position of the pole in the scattering amplitude, corresponding to the quasibound or virtual state, is hardly changed.
- Received 28 May 2009
DOI:https://doi.org/10.1103/PhysRevC.80.017001
©2009 American Physical Society