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Published byDemarcus Matthey Modified about 1 year ago

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Systematic on Rear Leakage correction Observation : Different behaviour between Data & MC

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Data TB 2007 / TB 2010 C_leak = A(E) – Slope * F2 Slope : no dependance with E in first approximation

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F2 Erec/Ebeam With Approximate option

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MC : 20 – 300 GeV Example of fits F2 Erec/Etrue

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Comparison TB/MC Compatible with flat for MC -Trend to drop with E with TB data -Flat or increasing for MC E_TB / Etrue (GeV)

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TB2010 : A Fit with /without : Approximate option A currently calculated on event by event basis - Reflect the tendancy - Point at 300 GeV ? Current approximation of A(E) event per event

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ISS Data Approximate Etrue with the energy of the integrated profile. Black/Red : 4 month data Grey/Orange : profile H Green : current guess of A per event

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TB2010 : slope Etrue (GeV)

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Systematics on Cleak A : - 2% Difference observed at 300 GeV (TB) Slope : + 15 % Change of slope in MC >> 300 GeV 1 TeV

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MC : Fit of “0.025”

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