Measurement of spin correlation coefficients in p-->p-->-->dπ+
Abstract
The spin correlation coefficent combinations Axx+Ayy and Axx-Ayy, the spin correlation coefficients Axz and Azz, and the analyzing power were measured for p-->p-->-->dπ+ between center-of-mass angles 25°<=θ<=65° at beam energies of 350.5, 375.0, and 400.0 MeV. The experiment was carried out with a polarized internal target and a stored, polarized beam. Nonvertical beam polarization needed for the measurement of Azz was obtained by the use of solenoidal spin rotators. Near threshold, only a few partial waves contribute, and pion s and p waves dominate with a possible small admixture of d waves. Certain combinations of the observables reported here are a direct measure of these d waves. The d-wave contributions are found to be negligible even at 400.0 MeV.
- Publication:
-
Physical Review C
- Pub Date:
- June 2000
- DOI:
- 10.1103/PhysRevC.61.064604
- arXiv:
- arXiv:nucl-ex/9912008
- Bibcode:
- 2000PhRvC..61f4604P
- Keywords:
-
- 24.70.+s;
- 25.10.+s;
- 29.20.Dh;
- 29.25.Pj;
- Polarization phenomena in reactions;
- Nuclear reactions involving few-nucleon systems;
- Storage rings;
- Polarized and other targets;
- Nuclear Experiment
- E-Print:
- 6 pages, 1 figure