[Hps-analysis] invariant mass Data VS My MC

[Bradley T Yale]

The test only contained what was in that file, so no background.

I can do it with background, but there is currently an open issue with the v3-fieldmap exclusive to beam-tri that I cannot find the source of:

https://jira.slac.stanford.edu/browse/SLIC-252


________________________________
From: Hps-analysis <hps-analysis-bounces at jlab.org> on behalf of Luca Colaneri <luca.colaneri at roma2.infn.it>
Sent: Thursday, October 8, 2015 9:18 AM
To: Maurik Holtrop
Cc: hps-analysis at jlab.org
Subject: Re: [Hps-analysis] invariant mass Data VS My MC

Hi Maurik,


Il 08/10/15 15:12, Maurik Holtrop ha scritto:
Hi Luca,

I am really glad that at least you are up and running again with code. Probably should not update your trunk, or at least preserve your current one, so it doesn't get messed up.
Sure, I won't risk any udate!

Did you impose any additional cuts to your data sample?  It looks like you did not and so have a large amount of extra background.

I didn't apply any cut, just read the collection and used the .getMass() method.
In the data I see what seems like an overlap of two distributions. I need to know how the collection gets filled to understand something. This is interesting, though.
Also, does the MC sample include full beam background, or is this only the tridents?
I let Bradley handle the reconstruction, anyhow he run my data through the same chain as the other MC, so it should contain everything.

Cheers,
Maurik


On Oct 8, 2015, at 9:05 AM, Luca Colaneri <<mailto:luca.colaneri at roma2.infn.it>luca.colaneri at roma2.infn.it<mailto:luca.colaneri at roma2.infn.it>> wrote:


Hello guys,
thanks to Bradley some of my events have been reconstructed. I read them and plotted the invariant mass using the "TargetConstrainedV0Candidates" collection.
I run the exact same driver over one file of run 5772 (pass2)
these are the results: My InvMass:

<invmassLuca.png>


this is from run 5772:

<invmassRun5772.png>

Real data looks wierd.

I would like to know how the "TargetConstrainedV0Candidates" collection gets filled, I tried to look in the code but I got lost.

today I can't attend the software meeting, maybe we can discuss it tomorrow. Until then, any comment is welcome

Cheers

L.


--
PhD Student,
Università degli Studi di Roma Tor Vergata
INFN sez. Roma2
Via della Ricerca Scientifica 1, 00133 Rome, Italy
+39 0672594562

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