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workaround for PndMicroWriter.cxx [message #9204]

Fri, 14 August 2009 15:46

Bernhard Roth
Messages: 8
Registered: February 2009
Location: Bochum

occasional visitor

From: *ep1.ruhr-uni-bochum.de

Hi,

to get my charged candidates filled, I did now a workaround for PndMicroWriter.cxx in /PndTools/AnalysisTools.
Its just a simple workaround, which gives me the 4 vectors and charge of charged candidates in tcands.root.

But there are still informations about the covariant matrix missing. So I can't do a vertex fit in my analysis.

I also got a fist spectrum with 100 events, which I have enclosed.
The first is the gamma spectrum (top, left), which has a lot of background. Pions are there, but the peak is not very clear. I guess that there are also hits from charged particles in the EMC, which are filled in the gamma list. Is this possible?
And how can I get rid of the background?

Bernhard

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Re: workaround for PndMicroWriter.cxx [message #9210 is a reply to message #9204]

Tue, 18 August 2009 11:17

Klaus Götzen
Messages: 293
Registered: June 2006
Location: GSI

first-grade participant

From: *adsl.alicedsl.de

Hi Bernhard,

I'm going to work on the MicroWriter when back from vacations next week. There have been changes related to PID which will introduce changes to the writer as well as the PndEventReader.

Concerning your plot your impression is correct, that there for the moment is no automatic removal of the neutral clusters created by charged particles, so those will end up in the photons list.

One simple workaround you can try (I already did something like this before) is to find for each neutral particle the charged particle with the smallest angular difference and cut on that minimum angle. That worked quite reasonable for me some time ago.

More to come from next week on, when I'm back in office.

Cheers,

Klaus

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Re: workaround for PndMicroWriter.cxx [message #9224 is a reply to message #9204]

Mon, 24 August 2009 12:17

Bernhard Roth
Messages: 8
Registered: February 2009
Location: Bochum

occasional visitor

From: *ep1.ruhr-uni-bochum.de

Hi,

I'm now on a workaround for PndMicroWriter.cxx to do Trackmatching.
For debugging reasons I wrote a shell script according to the go_stt_evtgen.sh from the PandaRootTutTorino09 to use the boxGen (pgun) from PANDAroot.
The script does a full simulation of a given particle type in a given momentum range for nEvents:
go_stt_pgun.sh <nEvents> <pid> <momentum1> <momentum2>

By editing run_sim_sttcombi_pgun.C the angle of the particles can also be adjusted.

Maybe it would be nice to have this script in svn, at the same location like the others (tutorials/analysis/)

Bernhard