Experimental study of the p d (d p )→3Heπ π reactions close to threshold
Abstract
New experimental data on the p d → 3Heπ+π- reaction obtained with the COSY-MOMO detector below the three-pion threshold are presented. The reaction was also studied in inverse kinematics with a deuteron beam and the higher counting rates achieved were especially important at low excess energies. The comparison of these data with inclusive p d → 3HeX0 rates allowed estimates also to be made of π0π0 production. The results confirm our earlier findings that, close to threshold, there is no enhancement at low excitation energies in the π+π- system, where the data seem largely suppressed compared with phase space. Possible explanations for this behavior, such as strong p waves in the π+π- system or the influence of two-step processes, are explored.
- Publication:
-
Physical Review C
- Pub Date:
- September 2016
- DOI:
- 10.1103/PhysRevC.94.034618
- arXiv:
- arXiv:1608.01530
- Bibcode:
- 2016PhRvC..94c4618B
- Keywords:
-
- Nuclear Experiment;
- Nuclear Theory
- E-Print:
- doi:10.1103/PhysRevC.94.034618