The Carnegie Mellon Partial Wave Analysis Project
Status Report on September 22, 2000

We have gotten the error calculator and the fitter debugged the point where we could start to produce results. In order to get things to work, it was necessary to be able to lock some parameters within the fit, but once this was done, the results have started to make sense. What are reported here are fits to 100% polarized data using Adam's blind weight as the input. We have ignored the two very small waves that are in the weight, (the a₁ D wave and the ₂ F wave), but the dominant waves are present.

Unlike the fits that Adam has performed, these rfits have been done in the reflectivity basis. For the four waves that are in the weight, we will fit to eight waves, (positive and negative reflectivity for each). The waves have been denoted with J^PCM^e where e refers to the reflectivity of the wave. Based on what we know from the weights, we expect that the strength in the positive and negative should be the same, but this has not been imposed on the fit.

We have also performed the fit for Monte Carlo data that has been run through the MCFast Monte Carlo for the experiments (labeled Accepted), and for the entire data set without Monte Carlo smearing, (labeled All). At least for the three pion final state, there is a very small effect due to acceptance and resolution of the detector.

The following are plots of the phase difference between the a₁ as a reference wave, and the three other partial waves in the fit.