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An option in the PID selector [message #14258]

Sat, 08 December 2012 21:45

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *dip.t-dialin.net

Dear PID users,

I'm wondering how can I use the option "Variable" in PndAnaPidSelector.

In my analysis macro, I have introduced a electron selector

Quote:

PndAnaPidSelector PIDelectron("PIDelectron"); PIDelectron.SetSelection("ElectronVeryLooseMinus");

The parameter of "VeryLoose" indicate the value of 0.1 into the selection as a set value.
I would like to test and make a tuning this global PID cut value from 0.01 to 0.5 for each particle.
I have seen there are an option "Variable" for this purpose in PndAnaSelectorPar.cxx
and I assume that one can adjust directly the input value in the analysis macro.

but I couldn't find the function, what I can control parameter.
How can I set the value with PndAnaPidSelector?

Thank you for your help,
Donghee

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Re: An option in the PID selector [message #14259 is a reply to message #14258]

Sat, 08 December 2012 22:50

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: 2.235.190*

Check the end of macros/params/all.par

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Re: An option in the PID selector [message #14260 is a reply to message #14259]

Sat, 08 December 2012 23:35

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *dip.t-dialin.net

Hi Stefano,

I'm talking about the way, that I control parameters in analysis level.If I change the value in all.par then will follow changing the value in my analysis macro?
How does it work?

Donghee

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Re: An option in the PID selector [message #14853 is a reply to message #14258]

Fri, 07 June 2013 19:12

Simon Reiter
Messages: 44
Registered: May 2013

continuous participant

From: *zeu.uni-giessen.de

Hi,

I'm interested in those parameters, too. What is the "variable" set for? And what is used if I use "Best" in FillList?

Simon

[Updated on: Fri, 07 June 2013 19:13]

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Re: An option in the PID selector [message #14854 is a reply to message #14853]

Fri, 07 June 2013 20:04

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: 2.235.190*

variate -> you can modify macro/params/pidana.par and all.par to set your own settings there.
Best -> the particles which has the highest probability.

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Re: An option in the PID selector [message #14855 is a reply to message #14258]

Fri, 07 June 2013 20:18

Simon Reiter
Messages: 44
Registered: May 2013

continuous participant

From: *zeu.uni-giessen.de

But isn't the value to insert the probability? Because I got better results with VeryTight than with Best. And with better results I mean less wrong detected particles.

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Re: An option in the PID selector [message #14856 is a reply to message #14855]

Fri, 07 June 2013 20:39

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: 2.235.190*

VeryTight means prob > 0.90.
Best is just the pio with the highest probability. This means that if your track has 0.25 probability being electron, 0.20 being a muon, 0.20 being a pion,0.20 being a kaon, 0.15 being a proton, it will be set as electron, even if with a poor probability.
Beast is not the best selection, is only setting the best hypothesis for such track.

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