QM poster

Hi Michael et al,

On Mon, 2003-12-22 at 20:34, Murray, Michael J wrote:
>     Dear Christian,
>            I would like to mention you fluctuation 
>            analysis in my QMe plenary talk. Can you make a
>            nicer version of Fig 7. 

I've attached the ROOT script that makes the figure (and a 
common script used by all the figures).  You can play width that as much
as you like.

The file is named `cholm-qm04-0.1/img/omegam_corr2.C' in the attached
tar-ball.  Note that you need the file `cholm-qm04-0.1/img/varisous.C'
as well (it sets up the style I've used through out my thesis and on the
poster). 
 
>            It might look better if
>            the data were rebinned. 

The bins of Fig. 7 corresponds to the bins in Fig. 6. Rebinninb the data
would reguire redoing the analysis with a smaller number of bins in
eta.  However, I tried that (to some extent) during my work on the my
thesis, and that didn't give any `better' results.

>            Also could you give a
>            simple idea of Wm. 

What do you mean `simple idea of Wm'?  Would you like some more words on
the poster or is it for your benefiet?  Or both? :-)

m_i is the particle production from each `source' in the collision,
where `source' may be the individual N+N collisions, QGP droplets,
Chiral Disoriented Condensates, high p_t jets, or what not.  It really
depends on what you believe the particle production is like. 

So bar{m} is the mean number of particles produced per source, and
sigma_m is the spread in the number of particles produced per source.  

omega_m is then the fluctuations in the number of particles produced per
source - or the so-called `intrinisc fluctuations'.  

Supposing that A+A collisions are superpositions of N+N collisions, so
that the `sources' are the binary collisions between the nucleons, then
omega_m should be compared to f. ex. the number predicted by
KNO-scaling.  In the case of a thermal source, the `sources' are really
not so much the binary N+N collisions, but rather the full system. 
However, as Heiselberg points out, the fluctuations should really be
constant in the case of a thermal source. 

Please note, that Fig. 7 depends on some GEANT simulations with a Hijing
input with all the caveats that implies.  Please refer to my thesis for
more on this.

>            When I print out your poster 
>            I cannot read it easily because it is so small.

The paper format of the poster is the one that the QM04 organisers gave
us: 122cm x 136cm (or 4' x 4'6").  Prining that on a US Letter or a ISO
A4 paper will obviously make it almost unreadable. 

Therefor I've attached a tar-ball so you can read the LaTeX file
directly.   To build the document, do the regular

  ./configure 
  make 

(You need LaTeX, PDFLaTeX, ROOT, Postscript, and a few other common
tools).  

I hope all this helps you a bit. 

A (slightly) delayed Merry Christmas and a (slightly) premature Happy
New Year to all of you.

Yours, 

-- 
 ___  |  Christian Holm Christensen 
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