sPHENIX discussion of physics

[Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>]

Hi all,

Whatever the method used to get an experimental centrality, for crosscheck purposes, one can also get the "true" centrality from the impact parameter used by Hijing and stored in the main HepMCEvent. I can pass around the code to get that info, if needed. (Ideally one should commit that code somewhere. Any suggestion ?)

Hugo

On 11/23/20 3:19 PM, Anthony Frawley wrote:

        Hi
          All,
        
        
        I
          would like to understand how the topical groups plan to make
          centrality selections when analyzing the MDC data.
          
        
        
        
        What
          are people planning to do?
        
        
        One
          could use the vertex object associated with each collision.
          The existing code (PHVertexFinder) will create a vertex object
          for each collision vertex and place it on the node tree in
          SvtxvertexMapActs. Each collision vertex will have a list of
          track keys associated with that vertex. That list can be used
          to access the tracks from SvtxTrackMap. The most basic
          centrality selection could be just the number of tracks
          associated with the collision vertex. More advanced selections
          could involve applying cuts on the associated tracks. 
        
        
        
        Cheers
        Tony
        
      
      
      
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