Source of Error | Estimated Value |
Forward/Back Comparison | |
Cosmics | 0% |
Ratio Fits | |
Slope Fits | 1% |
Theory |
We rerun the analysis with the requirement that pairs be unlike-sign removed and note how much doubling the background affects the results.
Fit | Error |
minbias 0 < y < 0.5 | 0.00271 |
minbias 0.5 < y < 1.0 | 0.00327 |
topology 0.1 < y < 0.5 | 0.00917 |
topology 0.5 < y < 1.0 | 0.0523 |
Dataset | 100% | 90% | 80% |
minbias 0 < y < 0.5 | 1.01 | 1.00 | 0.99 |
minbias 0.5 < y < 1.0 | 0.92 | 0.91 | 0.91 |
topology 0.1 < y < 0.5 | 0.83 | 0.83 | 0.87 |
topology 0.5 < y < 1.0 | 1.04 | 1.04 | 1.10 |
Two main models predict and describe the interference effect we see in the data. STARlight is the Monte Carlo event generator algorithm which is used in this analysis. It is based on theory and calculations by Klein and Nystrand. The other model is by Hencken, Baur, and Trautmann (HBT) .
KNLite Comparisons
Extensive predictions and comparisons have been made with the KNLite model by Jim Draper.STARlight Comparisons
Comparisons between STARlight and the Hencken, Baur, Trautmann (HBT) model. On the left are curves representing predictions for events without nuclear excitation. On the right are curves representing events with multiple neutron excitation. The curves have been normalized so that the area under the curves is equal to 1. The nuclear radius in STARlight has been adjusted to match the data as described here.Figure 1 & 2: