[Halld-physics] Organizing analyses of the spring commissioning data

[Justin Stevens]

Hi All,

We've been working on the organization of analyses for the recent commissioning data on the Physics Analysis wiki page https://halldweb1.jlab.org/wiki/index.php/Physics_Analysis#Analyses_-_Commissioning_Data.  There you will find some useful links and an (incomplete) list of possible analyses.  Example analysis plugins for many of these reactions have already been created and are in the svn repository, feel free to use them in starting an analysis of these channels or create your own plugin.  The reactions listed with example plugins have been observed in some form of bump hunting in the spring data, and I put together a few slides with some recent plots and comparisons to previous publications that can be found at http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=2755.

An analysis documentation page has been started for the g p -> p pi+ pi- reaction, which could be used as an example for those getting started with new analyses https://halldweb.jlab.org/wiki/index.php/Private:Spring_2015_pi%2B_pi-_Analysis. 

>From a related analysis we've outlined a set of suggested analysis cuts on another wiki page https://halldweb.jlab.org/wiki/index.php/Spring_2015_Commissioning_Analysis_Cuts.  As is described on that wiki page, some of these suggested cuts are already included in the DChargedTrack and DNeutralShower factories so they will be used in all analyses with a DReaction plugin by default.

The data and simulation samples for the spring commissioning are described in the two links below.  For analyzing the data we recommend starting with the REST format data produced in the bi-weekly offline monitoring "launches" that many of you are probably familiar with.  The offline monitoring group is planning another launch for this weekend and when that is finished a message will go out with the location of the REST files.  Some preliminary spring commissioning simulations are ongoing with a larger dataset planned to be produced soon as well.
https://halldweb1.jlab.org/wiki/index.php/Spring_2015_Dataset_Summary
https://halldweb.jlab.org/wiki/index.php/Spring_2015_Commissioning_Simulations

Paul has written extensive documentation of the ANALYSIS library used for analyzing these reactions which can be found on the wiki page https://halldweb1.jlab.org/wiki/index.php/GlueX_Analysis_Software.  People that are completely new to this may find it useful to start with the analysis workshop from 2 years ago, which goes into more detail with some additional exercises https://halldweb1.jlab.org/wiki/index.php/GlueX_Analysis_Workshop_2013.  These should serve as valuable references as you start an analysis, but please feel free to contact us with any questions you may have.

Finally, we hope this can serve as a starting point for getting more people involved in data analysis and would appreciate your feedback.  In particular, if you're interested in analyzing any of the reactions currently listed on the analysis webpage or have ideas for different analyses that should be added please let us know so we can help coordinate between different activities.  

Thanks,
Paul and Justin

Contacts e-mails:
Paul: pmatt at jlab.org
Justin: jrsteven at jlab.org