Home » PANDA » PandaRoot » Analysis » Vertex fitters' problems
| Re: Vertex fitters' problems [message #14892 is a reply to message #14888] |
Fri, 21 June 2013 18:43   |
L. Zotti
Messages: 6
Registered: December 2010
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occasional visitor |
From: *to.infn.it
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Dear Ralf,
thanks for your helping.
Looking in your analysis macro, I found you just missed one "break" at line 273. Actually with this modification, I got some better results from the ChiVtx fitter.
Moreover, cleaning the sample looking at the FitStatus flag, I got the following resolution:
PndChiVtxFitter x:32um y:52um z:138
PndVtxPRG (full) x:61um y:60um z:103um
PndVtxPRG (fast) x:60um y:61um z:103um
Plots for PndChiVtxFitter:
Plots for PndKinVtxFitter:
Plots for PndVtxPoca
Plots for PndVtxPRG
1)fast: 
2)full: 
Still to be understood why resolution are different in x and y for the PndChiVtxFitter.
Do you think this results are reliables?
The KinVtxFitter and the Poca one still give strange results.
For what concern the kinematics, actually the kaons and the pions from the d0-meson are well separated in angle, how you can see here:
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Attachment: opening_angle.png
(Size: 7.96KB, Downloaded 778 times)
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Attachment: ChiVtx.png
(Size: 25.80KB, Downloaded 783 times)
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Attachment: FastVtx.png
(Size: 27.66KB, Downloaded 771 times)
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Attachment: FullVtx.png
(Size: 26.98KB, Downloaded 758 times)
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Attachment: KinVtx.png
(Size: 26.92KB, Downloaded 756 times)
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Attachment: PocaVtx.png
(Size: 27.32KB, Downloaded 764 times)
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