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PID macro [message #13828]

Mon, 30 July 2012 15:07

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *kph.uni-mainz.de

Hi,

I'm wondering about an example code under PANDAroot/macro/pid/pid_check.C

A probability with name of flux is introduced

Quote:

PndPidProbability *flux = new PndPidProbability(239+237,114+101,2282+2375,35+42,517+1052);

Where do this numbers comes from ?

Best regards,
Donghee

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Re: PID macro [message #13829 is a reply to message #13828]

Mon, 30 July 2012 15:14

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

If you check the slides in my PID talk at the computing week you will find the answer.

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Re: PID macro [message #13830 is a reply to message #13829]

Mon, 30 July 2012 15:55

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *kph.uni-mainz.de

Hi Stefano,

Numbers are motivated from the sucessfully reconstructed multiplicity(yields) using 2000 events of DPM at 6 GeV/c antiproton beam.

If I want to have more precise numbers for instance 5 or 15 GeV/c case, then I should have slightly different numbers, that have to be studied, right?

And all numbers introduced with this particular yields will be normalized by summation of alel values, when I calling a function
GetXxxPidProb(), right?

If I'm wrong, please correct me.

Thank you, stefano!
Donghe

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Re: PID macro [message #13831 is a reply to message #13830]

Mon, 30 July 2012 16:21

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

I think at the present stage of the code you can also skip to use the flux, probability should be enough to separate different particles.
In more realistic case, flux will change according to energy and also to cuts, and inside the prob function you will have the normalized value.

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