Re: ratios 3.00 (fwd)

From: Dieter Rohrich (dieter@fi.uib.no)
Date: Tue Jul 02 2002 - 06:44:00 EDT

  • Next message: Ian Bearden: "RE: ratios 3.00 (fwd)"

    Dear Claus and JJ,
    
    a few comments:
    
    
    abstract
    
    second sentence:
    remove "and consistent with significant significant nuclear transparency"
    Many scenarios may result in ratios like the ones we have measured.
    And the main message of our paper is NOT to prove/disprove nuclear 
    transparency, but to present solid data which may shed light on the
    dynamics of the collision. See Chellis' comment.
    
    third sentence:
    remove "source in chemical equilibrium and"
    If we use statistcal models AND interprete the parameters as T and 
    mu_b, we implicitely assume chemical equilibrium. We cannot deduce
    from our data and the fitting to a statistical model chemical
    equilibrium. This sentence has to go out!
    
    
    Page 2:
    
    second column, first para.:
    add a sentence about our acceptance in pt, i.e. that we typically
    cover pt-ranges from x to y .
     
    
    Page 3:
    
    first column, second paragraph, first sentence:
    add a space between approx. and 2
    
    first column, last sentence, sec. c.,first s.:
    
    remove "This is consistent with the onset of the boost invariant
    plateau around midrapidity proposed by Bjorken."
    see comment above and Chellis' comment.
    
    
    Page 4:
    
    Fig.4:
    
    remove the fit (pbar/p)**(1/4). As Michael nicely pointed out,
    we have good reasons for the (pbar/p)**(1/3) curve, but no 
    physics argument for the (1/4) fit.
    
    add the predictions from the statistical model (Becattini et. al.)
    Why did you take out this curve???? It can't be too difficult to replot
    the curve from Fig. 4, PHYS REV, C64, 024901. 
    The authors have stated in their paper that the K-/K+ ratio is driven by
    the pbar/p ratio and his little dependence on T. And that is what we see.
    
    
    second column, first para.:
    
    remove "that can be expressed by a power law ..."
    See comment above. A fit to a (1/4) power law without a physics
    motivation is useless.
    
    remove "Comparison if the two relations indicates the universal
    relationship ,,,," 
    See comments above. Too speculative.
    
    last sentence:
    
    Rephrase sentence e.g. like this:
    
    "Within the framework of the statistcal model ([Becattini], solid line),
    Fig. 4 suggests, that the baryon chemical potentials decrease
    from ub=120Mev at y=3 to ub=25MeV at y=0 - keeping in mind that
    this interpretion assumes local strangeness conservation." 
     
    
    Second column, second para.:
    
    remove "suggesting the existence of a boost invariant midrapidity
    plateau dominated by particle production from the color field."
    Again, we have no evidence for such statements, and we do not 
    measure particle ratios to discover/prove/disprove boost invariant
    plateaus.
    
    
    
    With best wishes,
    Dieter
    
    
    -------------------------------------------------------------------
    Dieter Roehrich        |
    Fysisk institutt       |            Email: Dieter.Rohrich@fi.uib.no 
    Universitetet i Bergen |                        Tel:  +47-555-82722 
    Allegt. 55             |                        Fax:  +47-555-89440  
    N-5007 Bergen, Norway  | WWW: http://www.fi.uib.no/php/drhrich.html
    
    On Tue, 2 Jul 2002, Claus O. E. Jorgensen wrote:
    
    > 
    > Dear Colleagues,
    > 
    > Version 3.02 of the ratios paper is now ready. You can find it here:
    > 
    > http://www.nbi.dk/~ekman/RatioDraft3.02.ps
    > 
    > Thanks for the many comments from many of you. Much, but of course not all, has found 
    > its way into the manuscript.
    > 
    > Finally we have decided to drop the AMPT comparison. Only the K ratios do not agree so 
    > well. The discussion takes space and the calc. will clutter the otherwise striking fig 3. 
    > We'll save that for a later comparisonor talks.
    > 
    > We are now at the point where new mods. to the text introduce new errors. 
    > The length is also OK now.
    >  
    > A careful last proof reading of numbers would be appreciated by fresh eyes. The ambition is 
    > to submit wednesday afternoon.
    > 
    > regards
    > Claus and JJ
    > 
    > 
    



    This archive was generated by hypermail 2b30 : Tue Jul 02 2002 - 06:44:44 EDT