MuID alignment
This page shows a comparison of DGO vs momentum or radius in the MUID for
different alignment corrections. The used data sample for the testing was lvl2-filtered
(dimuon) events from Run5 p+p.
Different corrections used
Melynda's MuTR + MuID (black)
DG0 vs momentumProduced with the plot.C and plot_south.C macros in this dir.
![]() [Above] DG0_sqrt(x*x + y*y) vs momentum [Below] Same for North.
Melynda's corrections (black) and the MuidSurvey (green) work approx. equally well. MuidSurvey2 (reversed correction) does poorly.
DG0 vs gap0 radiusProduced with the plot2.C and plot2_south.C macros in this dir.
![]() [Avove] DG0_sqrt(x*x + y*y) vs radius of road position in MUID (gap 0) [Below] Same for North.
The MuidSurvey works better at larger radii. MuidSurvey2 (reversed correction) does worse.
MuidEff Efficiency Estimate ComparisonProduced with the compare.C macro in this dir.
![]() [Above] Difference (in %) between estimated efficiencies [Below] Same for North.
Lower right panel for each plot shows the difference for all HV groups in all gaps with reasonable statistics. The mean difference is within 0.1-0.2% between estimates with the default/previous/fake geometry and the new MuidSurvey geometry. This is approx. an order of magnitude smaller than the quoted systematics for the MuidEff (DataDriven) method.
|