Re: ZDC Vertex

From: Hironori Ito (hito@students.phsx.ukans.edu)
Date: Wed Mar 21 2001 - 16:38:14 EST

  • Next message: Christian Holm Christensen: "BRAT update (was Re: Createing a ZDC detector in the database)"

    	        Hello.  I made few more figures about Vertex correlation
    plots.  They are located in "http://pii3.brahms.bnl.gov/~hito" .
    1.  bbz_TPM1z.ps shows BB Vertex against TPM1 Cluster vertex.  Look at the
    value p1.  It is less than one.  This makes sense since the pad spacing
    used is incorrect.  In fact, it was wider than it should be.  This makes
    the slope to be less than one.  It makes sense.
    
    2.  zdcz_TPM1z.ps shows ZDC Vertex against TPM1 Cluster vertex.  It is
    basicly the same as the BB's figure.  But, my slope (p1)  is different
    from Bjorn's one.  Why???
    
    3.  bbz_TPM1z2.ps.gz shows the correlation between BB Vertex and
    centrality (BB Mult and Tile SumAdc).  It is seen that the slope is
    relatively flat until the half of Maximum centrality.  Then, it curves up.
    
    4. zdcz_TPM1z2.ps.gz shows the correlation between ZDC Vertex and
    centrality (BB Mult and Tile SumAdc).  It is clearly seen that the
    behavior of ZDC Vertex is different from BB Vertex.  It is flat (or going
    down to ) until 1/8 of maximum centrality.  Then, it starts to go up very
    linearly with centrality.  Also, the slope is steeper than that of
    BB.
    
    
            I hope these figures will help debugging the vertex.
    
            Hiro                                                        
    



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