High Pt analysis

From: Claus O. E. Jorgensen (ekman@nbi.dk)
Date: Thu Jul 04 2002 - 20:31:28 EDT

  • Next message: Ian Bearden: "RE: High Pt analysis"

    I've made some preliminary plots for my qm2002 talk. You can find them 
    here:
    
    http://www.nbi.dk/~ekman/highpt/highpt.html
    
    The main physics plots will be
    
    - (h++h-)/2 pt spectra for 0-5, 5-10, 10-20 and ~40-60% centrality at
      eta=0.
    
    - pt ratio (R) of central (0-10) to semi-peripheral (~40-60). Here I
      conlude that we our measurements indicate a suppression of high pt
      particles when comparing central to semi-peripheral collisions - this
      comparison is of course independent on fit ranges and reference data
      taken with another experiment.
    
    - ratios of spectra to p+pbar reference (ua1) data. These ratios are
      dependent on the choice of reference data and fit ranges/methods.
      However, suppression of high pt hadrons is observed and it is more
      pronounced for the central collisions.
    
    - ratios of protons to all hadrons as function of pt. Mesonic vs. baryonic 
      jets??? Who knows about this stuff? Is my result reasonalbe (I just
      pulled out the numbers)?
    
    - pi- spectrum at y approx 2.2 for 0-15% central. The statistics are
      unfortunately not good enough to make qualitative statements on the
      slope at high pt. 
    
    - pi- pt ratios of central (0-10) to semi-peripheral (~40-60). The ratio
      constant (within the erros). What do we expect at forward rapidities?
    
    
    Comments and suggestions are very welcome...
    
    Cheers,
    
    Claus
    
    
    +-------------------------------------------------------------+
    | Claus Jørgensen                                             |
    | Cand. Scient.                  Phone  : (+45) 33 32 49 49   |
    |                                Cell   : (+45) 27 28 49 49   |
    | Niels Bohr Institute, Ta-2,    Office : (+45) 35 32 53 07   |
    | Blegdamsvej 17, DK-2100,       E-mail : ekman@nbi.dk        |
    | University of Copenhagen       Home   : www.nbi.dk/~ekman/  |
    +-------------------------------------------------------------+
    



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