[Halld-offline] Fwd: r7878 - trunk/sim-recon/src/libraries/PID

[David Lawrence]

Hi All,

     Just a heads up that I just committed a change to the repository 
that should start to address the issue with low b1pi efficiency that 
we've been seeing since the middle of March. See the svn log entry below 
for details. There may still be some bugs that need to be worked out 
with the new system. I will continue to work on this and will report 
once things are back to "normal".

     Thanks to both Nathan S. and Paul M. for helping identify the 
source of the problem.

Regards,
-David

-------- Original Message --------
Subject: 	r7878 - trunk/sim-recon/src/libraries/PID
Date: 	Tue, 31 May 2011 09:12:41 -0400
From: 	Hall-D.SVN.Repository at jlab.org
To: 	davidl at jlab.org, brash at pcs.cnu.edu, wolin at jlab.org, 
zisis at uregina.ca, mashephe at indiana.edu, remitche at indiana.edu, 
zihlmann at jlab.org, somov at jlab.org, staylor at jlab.org, 
kmoriya at indiana.edu, pmatt at jlab.org



Author: davidl
Date: 2011-05-31 09:12:40 -0400 (Tue, 31 May 2011)
New Revision: 7878

Modified:
    trunk/sim-recon/src/libraries/PID/DVertex_factory.cc
    trunk/sim-recon/src/libraries/PID/DVertex_factory.h
Log:
Increased the default number of sigmas that particles could be separated in time and z-position each to 100 from 3. This is to temporarily address the issue of having too many vertexes reconstructed leading to multiple DPhysicsEvent objects for nearly every generated b1pi event.

The above number of sigmas were put into two configuration parameters so they are adjustable at run time. They are PID:GROUP_NUM_SIGMAS_TIME and PID:GROUP_NUM_SIGMAS_Z.

Debugging histograms were added to monitor the number of sigmas actually calculated for the data set being analyzed. These are disabled by default, but can be enabled by setting the PID:DEBUG_HISTS to "1".

The PID:DEBUG_HISTS was also made to control creation and filling of the other two existing debug histos so the decision could be made at run time as opposed to compile time.


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