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Re: DPM theta cut off [message #13906 is a reply to message #13905] Wed, 29 August 2012 12:26 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
Dear all,

So, I am now more clear than before for this approach.

The value of -t=1e-2 GeV^2 is chosen to get standard cut-off value.
Then I'm wondering the ratio between total cross-section and elastic one for this cut-off value. Is it still comparable with experimental data?
Thomas used the cut-off value at the coulomb-nulear intersaction in his study, and found reasonably well described ratio.

That mean, that he used -t equal to 1e-3 GeV^2 and cut-off theta is deduced 4 times smaller than introduced value in PndDpmDirect.
It was about 0.1 degree at 15GeV/c.

Does anyone make some test for that?
or motivated just MVD detector point of view, which have sufficient energy to go through the MVD layers.
I think that cut off 4 degree at 1.5 GeV might be too large to study lumi detector, for example. Because Lumi can cover 3-8 degree.

Thank you for your teaching.
Best regards,
Donghee

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