P-wave dominance in the pd -> 3He pi+ pi- reaction near threshold measured with the MOMO experiment at COSY
Abstract
The cross section of the pd -> 3He pi+ pi - reaction has been measured at the MOMO facility in a kinematically complete experiment at a c. m. excess energy of Q = 70 MeV. The energy and angular distributions show that the reaction is dominated by p-wave pi+ pi- pairs. This is in complete contrast to the results of inclusive measurements at somewhat higher energies which show a strong s-wave ABC enhancement at low pi pi masses. There are however indications of p-wave pion pairs from other experiments at low Q.
- Publication:
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arXiv e-prints
- Pub Date:
- December 1998
- DOI:
- 10.48550/arXiv.nucl-ex/9812011
- arXiv:
- arXiv:nucl-ex/9812011
- Bibcode:
- 1998nucl.ex..12011B
- Keywords:
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- Nuclear Experiment
- E-Print:
- 9 pages, 2 figures