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Re: vertex fitting [message #17271 is a reply to message #17269]

Wed, 10 September 2014 14:59

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *lnf.infn.it

If you have an efficiency high close to the IP and smaller far, then your fit will be biased. Then, in general, one uses simulation to evaluate the efficiency as a function of the position, and after you use this function to correct your experimental data.
The fact that you have a mean life different from the MC tells you that the reconstruction efficiency is not flat as a function of the distance. But I would not be scared by this.

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[Message index]

		vertex fitting By: Alexandros on Mon, 08 September 2014 13:26
		Re: vertex fitting By: Ralf Kliemt on Mon, 08 September 2014 14:07
		Re: vertex fitting By: StefanoSpataro on Mon, 08 September 2014 14:21
		Re: vertex fitting By: Alexandros on Wed, 10 September 2014 11:38
		Re: vertex fitting By: StefanoSpataro on Wed, 10 September 2014 11:57
		Re: vertex fitting By: Alexandros on Wed, 10 September 2014 12:07
		Re: vertex fitting By: StefanoSpataro on Wed, 10 September 2014 12:08
		Re: vertex fitting By: Alexandros on Wed, 10 September 2014 12:51
		Re: vertex fitting By: StefanoSpataro on Wed, 10 September 2014 14:59
		Re: vertex fitting By: Alexandros on Wed, 10 September 2014 15:15

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