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For more information, see this March 2012 talk by Hans Wenzel
CCAL02 Introduction
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The reconstruction will attempt to use particle flow algorithm techniques to reconstruct the W or Z mass in these datasets. This is interesting because distinguishing the W and Z can help find and measure the Higgs and other particles, which is challenging due to their natural mass width and small mass difference (W mass mean ~= 80 GeV vs Z mass mean ~= 91 GeV).
Running the Analysis
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To set up the framework, it will be necessary to follow the instructions here, being sure to install the lcsim, GeomConverter and lcsim-contrib packages as well as JAS3 with the listed plugins.
The lcsim-contrib package contains a folder named SteveMagill (which should be located somewhere like ~/netbeans/lcsim-contrib/src/main/java/org/lcsim/contrib/SteveMagill/), whose efforts on ccal02 and assistance have made this possible. This analysis will use the drivers found here, though you will have to make a few minor modifications.
One of the drivers used requires a DigiSim steering file, attached here . Download the steering file and edit line 21 of the PFACSClusdMJetDriver.java to point to your copy of the file, eg.
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String dsteer = ("/home/aconway/work/steer/CCAL002M50.steer");
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In addition, it may be necessary to download the ccal02 detector description and place it into your ~/.lcsim/cache directory (or wherever JAS3 stores these detector files on your operating system), as the file pulled by JAS3 when analyzing ccal02 data may be incomplete, preventing the analysis from running.
Running the Analysis
The lcsim-contrib package contains a folder named SteveMagill (which should be located somewhere like ~/netbeans/lcsim-contrib/src/main/java/org/lcsim/contrib/SteveMagill/), whose efforts on ccal02 and assistance have made this possible.
In some environments (Windows, in particular), JAS may automatically pull this broken file into the cache, overwriting the correct version. If this happens, it may be necessary to disable your Internet connection when starting any analysis.
This folder contains a file called PFADRSelect.java. To run the analysis, run JAS3 and load this file the file PFADRSelect.java from the SteveMagill folder using File -> Load... and open the panpyZZnunubaruds.slcio file using either File -> Open... or File -> Open Data Source... The analysis should begin to run and create many plots, which we will get to later. It will take a long time to complete, but it should only be necessary to process a few hundred events for most purposes. To stop the analysis before it is finished, hit the square button next to the one used to start it.