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Home » PANDA » PandaRoot » Fast Simulations » [FIXED] Problem with mass constraint fit for two gamma
Re: Problem with mass constraint fit for two gamma [message #16882 is a reply to message #16869] Tue, 01 July 2014 10:57 Go to previous messageGo to previous message
donghee is currently offline  donghee
Messages: 385
Registered: January 2009
Location: Germnay
first-grade participant
From: *dip0.t-ipconnect.de
Hi Lu,

Left is for the D0 (gamma gamma) and right is after mass constraint fit.
index.php?t=getfile&id=7941&private=0
As you mentioned, chi2 is squeezed to 0 also in my case.
But I guess that the background issue is not connected with this problem of mass fitter.
We need to solve matrix problem of EMC in the case of full simulation, then chi2 distribution should be reasonable. Razz

Best wishes,
donghee
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