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PID macro [message #13828] Mon, 30 July 2012 15:07 Go to next message
donghee is currently offline  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
Re: PID macro [message #13829 is a reply to message #13828] Mon, 30 July 2012 15:14 Go to previous messageGo to next message
StefanoSpataro is currently offline  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.
Re: PID macro [message #13830 is a reply to message #13829] Mon, 30 July 2012 15:55 Go to previous messageGo to next message
donghee is currently offline  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

Re: PID macro [message #13831 is a reply to message #13830] Mon, 30 July 2012 16:21 Go to previous message
StefanoSpataro is currently offline  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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