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How to implement Various PID Criteria for the analysis?? [message #18825]

Thu, 10 December 2015 12:11

Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore

continuous participant

From: 125.21.19*

Dear All,

I am trying to implement different PID criteria by putting key words like as Loose, Tight, Best other then the "All" key word for my analysis.
Somehow, the implementation of different keywords does not effect my results. I had same results after implementation of all PID info key words in case of my analysis.

What should I do more to apply various PID as putting these key word does not help me.

Kindly help me in this regard.

I have attached my analysis macro and output histogram root files here.

Thanking you

Ajay

Attachment: run_ana_complete_llbar.C
(Size: 4.77KB, Downloaded 388 times)
Attachment: all.root
(Size: 7.05KB, Downloaded 338 times)
Attachment: loose.root
(Size: 7.06KB, Downloaded 327 times)
Attachment: best.root
(Size: 7.05KB, Downloaded 328 times)

AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India

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Re: How to implement Various PID Criteria for the analysis?? [message #18830 is a reply to message #18825]

Thu, 10 December 2015 22:33

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: 93.49.201*

Please check our wiki documentation:

https://panda-wiki.gsi.de/foswiki/bin/view/Computing/PandaRootRhoTutoria l#A_2.2.3._PID_Algorithms

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Re: How to implement Various PID Criteria for the analysis?? [message #18846 is a reply to message #18825]

Tue, 05 January 2016 10:23

Ralf Kliemt
Messages: 507
Registered: May 2007
Location: GSI, Darmstadt

first-grade participant

From: *gsi.de

Hello Ajay.

I can see a few reasons why you don't see differences, those may overlap.

- Selection of keywords: "All" up to "Loose" is for particles with a low likelihood for your hypothesis. Here are the cut values connected to the keywords (defaults in macro/params/all.par):
0.00 - "All"
0.00 - "VeryLoose"
0.25 - "Loose"
0.50 - "Tight"
0.90 - "VeryTight"

- Your channel: Your signals that survive the simulations/reconstruction and you selection may be just identified very well. Signal Protons should stick out quite well against signal pions.

- Simulation setup. Depending if it is full or fast simulations, how well the forward part is implemented, etc. you'll find various PID efficiencies.

Cheers!
Ralf

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