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Re: DPM theta cut off [message #13904 is a reply to message #13890] Wed, 29 August 2012 11:09 Go to previous messageGo to previous message
donghee is currently offline  donghee
Messages: 385
Registered: January 2009
Location: Germnay
first-grade participant
From: *kph.uni-mainz.de
I'm considering now a simple approach to introduce cut off parmater theta according Thomas work.


I found cut off values for certain beam momentum from the equation, which is suggested in his Thesis.
Quote:


double mom = 15; //beam momentum
double cut = 0.0777-0.976*TMath::Log10(mom);
double cutoff=TMath::Power(10, cut);


Quote:


mom = 1.43170 ; cms = 2.23 ; cut off theta =0.842536
mom = 15.000 ; cms = 5.474 ; cut off theta =0.085079


Then I put this value into the theta minimum in the control option for PndDpmDirect.

Could someone confirm about the value and this approach?

Best wishes,
Donghee

 
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