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Re: Chi2 of kinematic and vertex fitters [message #15752 is a reply to message #15750] Tue, 03 December 2013 11:49 Go to previous messageGo to previous message
Elisabetta Prencipe (2) is currently offline  Elisabetta Prencipe (2)
Messages: 213
Registered: February 2013
first-grade participant
From: *ext.kfa-juelich.de
Hi Stefano,

I am running my test jobs in the pandaroot rev. 22626, and I found again negative chi2 of the vertex fit (only; the mass fit constraint does not give negatice chi2 in my case). The difference with the previous revision (rev 21003) is that now I get improvements: only decays where photons got involved give me few entries with negative chi2. In the previous revision (21003), I had many of them. Also, the efficiency is definitively improved in the new revision (22626): in the decay p pbar to Ds Ds1'(2536)+, Ds1'(2536)+ to D*0pi+, I have got:

rev 21003: 21% efficiency
rev 22626: 30% efficiency



cheers, Elisabetta
 
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