| Reconstruction efficiency of LHE tracking [message #9096] |
Wed, 29 July 2009 12:55  |
donghee
Messages: 385
Registered: January 2009
Location: Germnay
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first-grade participant |
From: *kph.uni-mainz.de
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Hi all,
I have one question about LHE tracking.
Does anybody make some study for dependence of LHE tracking on the different interaction point.
I have tested LHE tracking only with electron.
You can find generated electorn theta angle distribution in the attached figure.
It turned out that the tracking efficiency depends strongly on the interaction point(or primary vertex).
If I simulate the LHE tracking with electron in the z-range with z=(-10,10), I have ~ 50% reconstruction efficiency at the starting from 60 upto 160 degree electron.
But if I'm going to z=(10,30) by z smearing, which is moved to 20cm downstream from the target region, the reconstructed electron is only ~12.0%.
Is the LHE tracking optimised only at the (x=0,y=0,z=0)?
If I do simulation same data without delta z, i.e., only at (x=0,y=0,z=0), the efficiency increase slightly as 56%.
Can you already expect this trend?
Best wishes,
Donghee Kang
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Attachment: electron.png
(Size: 24.77KB, Downloaded 409 times)
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