Negative lambda masses after VtxFit [message #21890] |
Tue, 05 December 2017 11:02 |
Jennifer Pütz
Messages: 47 Registered: April 2015 Location: FZ Juelich
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continuous participant |
From: *ikp.kfa-juelich.de
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Hi all,
I observed negative lambda masses after vertex fitting. Likewise, the mass distribution after the mass constraint fit is strange.
The mass distribution of the non-fitted lambda candidate seems to be fine. (See the attached plots!)
Is there anyone else observing this? I know that Albrecht has also unphysical masses for lambda.
I am using the standard simulation macros (for the task),
PandaRoot trunk rev. 30210
FairRoot v17.03
FairSoft mar17
The production was made on Kronos. I attached also the Dec-File.
I also tried a different trunk version (rev 30202), but the problem is still observable.
Best regards,
Jenny
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