Transverse Impact Parameter Resolution FCCee Peter Winkel Rasmussen - - PowerPoint PPT Presentation

Transverse Impact Parameter Resolution FCCee

Peter Winkel Rasmussen August 22, 2017

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Introduction

The 2017-07-12 version of the ILC software was used. The the FCCee o5 v03 detector model was used. Muons were fired with 1 GeV, 10 GeV and 100 GeV at various angles in θ. The muons are uniform in φ This was repeated 2000 times. Events were reconstructed using truth tracking, with and without the new refit. Events with recoP < 0.9 · trueP were excluded. This primarily affect very forward events. σ(d0) for a given angle and energy was found by fitting a histogram

• f d0reco − d0truth with a Gaussian.

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D0 distributions

[mm] d ∆ 0.01 − 0.005 − 0.005 0.01 Count 20 40 60 80 100 120 140 DeltaD0_muon_100GeV_theta85 Entries 2000 Mean 05 − 4.523e Std Dev 0.003705 Underflow 1 Overflow 2 / ndf

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χ 47.11 / 43 Prob 0.3081 Constant 3.0 ± 105.7 Mean 05 − 8.478e ± 05 − 9.852e Sigma 0.000066 ± 0.003688

(a) Normal truth tracking

[mm] d ∆ 0.01 − 0.005 − 0.005 0.01 Count 50 100 150 200 250 DeltaD0_muon_100GeV_theta85 Entries 2000 Mean 05 − 2.911e Std Dev 0.001647 Underflow Overflow / ndf

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χ 23.46 / 24 Prob 0.493 Constant 6.8 ± 244.3 Mean 05 − 3.649e ± 05 − 3.893e Sigma 0.000026 ± 0.001615

(b) Truth tracking with refit

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FCCee o5 v03

[degrees] θ 10 20 30 40 50 60 70 80 90 m] µ ) [ (d σ 1 10

2

10

3

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FCCee_o5_v03 - Truth - 1GeV FCCee_o5_v03 - Truth - 10GeV FCCee_o5_v03 - Truth - 100GeV FCCee_o5_v03 - Truth - Refit - 1GeV FCCee_o5_v03 - Truth - Refit - 10GeV FCCee_o5_v03 - Truth - Refit - 100GeV

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