Transverse Impact Parameter Resolution FCCee Peter Winkel Rasmussen August 22, 2017 Transverse Impact Parameter Resolution FCCee 1 / 4
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 ( d 0 ) for a given angle and energy was found by fitting a histogram of d 0 reco − d 0 truth with a Gaussian. Transverse Impact Parameter Resolution FCCee 2 / 4
D0 distributions DeltaD0_muon_100GeV_theta85 DeltaD0_muon_100GeV_theta85 Count Count 140 Entries 2000 Entries 2000 − − Mean 4.523e 05 Mean 2.911e 05 250 Std Dev 0.003705 Std Dev 0.001647 120 Underflow 1 Underflow 0 Overflow 2 Overflow 0 200 χ χ 100 2 / ndf 47.11 / 43 2 / ndf 23.46 / 24 Prob 0.3081 Prob 0.493 ± ± 105.7 3.0 244.3 6.8 Constant Constant 80 150 − ± − − ± − Mean 9.852e 05 8.478e 05 Mean 3.893e 05 3.649e 05 Sigma ± Sigma ± 0.003688 0.000066 0.001615 0.000026 60 100 40 50 20 0 0 − − − − 0.01 0.005 0 0.005 0.01 0.01 0.005 0 0.005 0.01 ∆ ∆ d [mm] d [mm] 0 0 (a) Normal truth tracking (b) Truth tracking with refit Transverse Impact Parameter Resolution FCCee 3 / 4
FCCee o5 v03 3 10 m] FCCee_o5_v03 - Truth - 1GeV µ FCCee_o5_v03 - Truth - 10GeV ) [ 0 (d FCCee_o5_v03 - Truth - 100GeV σ FCCee_o5_v03 - Truth - Refit - 1GeV FCCee_o5_v03 - Truth - Refit - 10GeV 2 10 FCCee_o5_v03 - Truth - Refit - 100GeV 10 1 10 20 30 40 50 60 70 80 90 θ [degrees] Transverse Impact Parameter Resolution FCCee 4 / 4
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