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Re: vertex fitting [message #17263 is a reply to message #17257]

Wed, 10 September 2014 11:38

Alexandros
Messages: 51
Registered: January 2014
Location: KVI

continuous participant

From: *kvi-cart.rug.nl

Hi again,
I have one more question..
I am trying to calculate ctau for D0 meson in my analysis(123micrometers)
From the mc the calculation is correct(125micrometers).
From the vertex information I get 185micrometers..
I have looked several times my code and I could not find a single mistake..
Is there a chance, since we are talking about micrometers that the resolution is not good or there is something else wrong??
I attach my code and my results to get an idea..
Thanks!!

Attachment: Analysis.C
(Size: 12.57KB, Downloaded 358 times)
Attachment: Draw.C
(Size: 3.03KB, Downloaded 344 times)
Attachment: distance_from_IP.pdf
(Size: 17.98KB, Downloaded 390 times)
Attachment: betaVSenergy.pdf
(Size: 34.63KB, Downloaded 325 times)
Attachment: ctau_and_beta*gamma_mc.pdf
(Size: 16.88KB, Downloaded 331 times)
Attachment: ctau_and_beta*gamma_data.pdf
(Size: 17.11KB, Downloaded 333 times)

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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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