200 dndeta paper

From: Ramiro Debbe (debbe@sgs1.hirg.bnl.goV)
Date: Fri Nov 16 2001 - 12:07:31 EST

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    Hi, I have put together a figure that you will find attached with this
    message.
    The figure plots dndeta/(Npart/2) as function of the middle of the
    centrality bin.
    The red squares are the 200 GeV data at eta=0 and the blue stars
    correspond to same set but at 130 GeV. This way of plotting the data is
    an attempt to avoid using a non measured quantity in both axes. I think
    a number intimately related to the centrality of the collision is good
    because the volume of the system is the same, what changes is the
    available energy for particle production.
    I fit the 130 GeV points with a straight line and if I were to include
    the error bars I could get a good representation of the 200 GeV data by
    scaling up  the fit by ~8%
    I think the trend we see in figure 5 of the paper is still there and
    once again saturation is not something that jumps at you.
    I would suggest we cut the discussion about fits to Npart and Ncoll
    because after going thru that trouble, the next paragraph is asking the
    reader to take the results with a grain of salt.
    
    Ramiro
    
    
    

    dndetaVScent.gif



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