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Optimizing Efficiency in Rich Inefficiency Modules for High and Low Field Settings

Explore strategies and formulas for merging low and high field settings in Rich Inefficiency Modules to enhance efficiency. Understand the impact of different inefficiency components and learn how to extract pure "gamma factor" inefficiencies. Discover innovative solutions for incorporating diverse polarities and track resolutions. The provided details offer insights into calculating effective efficiencies using the RichEfficiencyCalculator tool.

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Optimizing Efficiency in Rich Inefficiency Modules for High and Low Field Settings

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  1. RICH efficiency versus p/pth - merging low and high field settingsIncorporating different inefficiency components => RichInefficiencyModule Paweł Staszel Jagiellonian University

  2. At high fields inefficiencies for A and B polarities are different It is due to different pion+kaon and proton contributions

  3. Extracting pions+kaon and protoninefficiency (1)‏ All coefficients are known, so, this set of equations can be solved in respect to fπ and fp for each momentum bin

  4. Results for 2A3450 + 2B3450 Cut on x-slope makes the inefficiencies free from “geometrical” effect allowing to extract pure “gamma factor” inefficiency

  5. Results for all possible settings Rich vs Tof2 X-slope>0.01 => pure “gamma factor” effect

  6. Fitting low and high part of p/pth Ordinary exponent with build-in matching to low p/pth Usual inefficiency formula

  7. Zoom in at low p/pth

  8. Zoom in at high p/pth

  9. Strategy for RichEfficiencyModule We have to deal with 3 effects: 1. “gamma factor” effect Eγ 2. “x-slope (geometrical)” effect Eg 3. two track resolution effect Er It is fair to assume that these effects are independent, if so, the total efficiency is a product of individual efficiencies: For small inefficiencies: But in general: See attached note on two track resolution

  10. Problem: not all fsTrack are reconstructed Using condition #T5tracks = 1 versus no condition on #T5Tracks give small effect because usually #fsTracks = #T5Tracks, Events with #T5Tracks > 1 (#T5Tracks=2) looks similar to events with #fsTracks==2.

  11. Same effect at high fields (2 deg)‏

  12. Same effect at high fields (4 deg)‏ Possible strategies: 1) add x/y - slope info for each T5 track and redo dsts 2) apply an average efficiency related to two track resolution determined from events with #fsTracks=2.

  13. How to use RichEfficiencyCalculator The calculator is in banapp/corrections/efficiency RichEfficiencyCalculator* richEffCal=new RichEfficiencyCalculator(“run04”,”auau”,”200”); richEffCal->Init(); in event loop: richEffCal->CalculateEffectiveEfficiencies(multi,d12,d13,d23); (see attached note)‏ if track loop: Float_t InEff = richEffCal->GetInEffic(i,t5ax,p/pth); or Float_t Eff = richEffCal->GetEffic(i,t5ax,p/pth);

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