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Re: Different x-y resolutions [message #12322 is a reply to message #12311] Thu, 21 July 2011 17:54 Go to previous message
Simone Bianco is currently offline  Simone Bianco
Messages: 29
Registered: January 2009
continuous participant
From: *cb.uni-bonn.de
Thanks Tobias, the constant field worked fine. Using the same parameters as before I got really similar results:
index.php?t=getfile&id=6546&private=0
So, this should exclude effects of asymmetries in the magnetic field.

I tried to select smaller theta ranges and what I notice is that in the "forward" part everything works fine. For example here you see what I obtained (always with four pions of 1GeV/c) limiting the theta range to teh range [30,40]°:
index.php?t=getfile&id=6547&private=0
Increasing theta the situation gets worse. This is what I obtained in the range [60,70]:
index.php?t=getfile&id=6548&private=0



Cheers,

Simone



PS: all these plots were obtained using the POCA vertex finder
 
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