Tensor Target Polarization at TRIUMF

[摘要] The first measurements of tensor observables in π scattering experiments were performed in the mid-80's at TRIUMF, and later at SIN/PSI. The full suite of tensor observables accessible in π elastic scattering were measured: T20, T21, and T22. The vector analyzing power iT11was also measured. These results led to a better understanding of the three-body theory used to describe this reaction. A direct measurement of the target tensor polarization was also made independent of the usual NMR techniques by exploiting the (nearly) model-independent result for the tensor analyzing power at 90°cmin the π → 2p reaction. This method was also used to check efforts to enhance the tensor polarization by RF burning of the NMR spectrum. A brief description of the methods developed to measure and analyze these experiments is provided.

[发布机构] Jefferson Lab, 12000 Jefferson Ave., Newport News; VA; 23606, United States^1

[关键词] Analyzing power;Direct measurement;Measurements of;Model independent;NMR spectrum;NMR techniques;Target polarization;Tensor polarization