Mult paper 200 GeV

From: Ramiro Debbe (debbe@sgs1.hirg.bnl.goV)
Date: Wed Nov 21 2001 - 14:30:48 EST

  • Next message: Betty McBreen: "pii user disk 93%"

    I still believe that figure 5 has a the weakness of having a calculated
    quantity in both axes. One can do similar work as the one done in our
    draft with the x axis displaying fractions of total cross section.
    But the community is already using the figure that we plan to show and
    it may be convenient to follow the trend. We provide the data in the
    table and one can display in whatever way one likes.
    What is missing in the discussion about fig 5 in the paper is a
    conclusion; if these fits were inspired by the Karzeev and Levin paper
    we could say that the ratio of beta(200)/beta(130) extracted from our
    data is 1.24 and not 1.33 that they estimate for the "soft plus hard"
    model. (unfortunately the errors are such that the difference doesn't
    look very significant)
    About the same figure. The predictions from Karzeev and Levin (their
    figure 5, what a coincidence!) show curves with positive non zero
    slopes. The curves we display in our figure have a region where the
    slope is zero for the eta = 0 and 3.0.
    We must be using and upgraded calculation. Have we checked with them
    about this difference?
    
    The caption of figure 1 says that the statistical error are showed for
    all points where they are smaller that the symbol, shouldn't it be the
    opposite you just plot the symbol it the statistical errors are smaller
    than it.
    The systematic error are shown as "isolated error bars". I only see
    error bars on the BBC data , but the text mention 8% for SiMa and 10%
    for BBC, we should put some representative error bars at mid-rapidity.
    If dn/dy is flat near y=0 the dip at eta=0 is produced by the jacobien
    of the transformation y -> eta. Our "dip" seems to wander by almost 1/2
    a unit of eta.
    Has that been included in our point to point errors?
    
    Why are the errors absent from figure 3? According to the caption they
    are all smaller than the symbol. As I remember AMPT and HIJING were only
    1 sigma away from the data for the 130 GeV data.
    
    I like figure 4 its four panels are still labeled a b c and d and the
    text says they are extracted from samples with different centrality cuts
    but it doesn't give the values.
    I would like to change the vertical scale (from 1 to 1.8) to see the
    change from peripheral to central. The main message from this figure is
    that things changed smoothly from 130 to 200.
    
    Ramiro
    
    
    
    
    
    
    
     --------End of Unsent Message
    



    This archive was generated by hypermail 2b30 : Wed Nov 21 2001 - 14:24:49 EST