[Rivet] ALICE analysis.

[Hendrik Hoeth]

Hi Pablo,

thanks a lot for that analysis. It looks good and I committed it to the
Rivet repository, so it is available in svn now and will be in the next
release.

Just a few very minor tips for the future:

- You sum the event weights manually, even though you don't have any
  cuts in the analysis. There is a sumOfWeights() function that you
  can use in your histogram normalisation instead. Exactly the same
  thing, just a bit less coding for you.

- The setBeams(PROTON, PROTON); line isn't needed anymore. I know, we
  still have it in most analyses, but I'm going to delete it everywhere
  today, since this information is now read from the .info file.

- The .plot file supports regular expressions and partial names for the
  histogram IDs, so that when you have many histograms with e.g. the
  same XLabel or YLabel you can save yourself some typing. The last
  matching section wins. I've attached you an abbreviated version of
  your .plot file as example. Again, this doesn't change anything in the
  output, but reduces your workload and makes the file a bit more
  readable.

- Purely cosmetic: I've shortened the histogram titles a bit so that
  they fit over the width of the plots.

Best regards, and thanks again,

    Hendrik

-- 
A man without a dream in his heart already has one foot in the grave.
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# BEGIN PLOT /ALICE_2011_S8945144/d0
XLabel=$p_\perp$ [GeV/c]
YLabel=$1/N_\text{event} d^{2}N/dy/dp_\perp$ [GeV/c]$^{-1}$
# END PLOT


# BEGIN PLOT /ALICE_2011_S8945144/d01-x01-y01
Title=$\pi^+$ tranverse momentum, $|\eta|<0.5$, $\sqrt{s}=0.9$ TeV (INEL)
# END PLOT

# BEGIN PLOT /ALICE_2011_S8945144/d01-x01-y02
Title=$\pi^-$ tranverse momentum, $|\eta|<0.5$, $\sqrt{s}=0.9$ TeV (INEL)
# END PLOT

# BEGIN PLOT /ALICE_2011_S8945144/d02-x01-y01
Title=$K^+$ tranverse momentum, $|\eta|<0.5$, $\sqrt{s}=0.9$ TeV (INEL)
# END PLOT

# BEGIN PLOT /ALICE_2011_S8945144/d02-x01-y02
Title=$K^-$ tranverse momentum, $|\eta|<0.5$, $\sqrt{s}=0.9$ TeV (INEL)
# END PLOT

# BEGIN PLOT /ALICE_2011_S8945144/d03-x01-y01
Title=$p$ tranverse momentum, $|\eta|<0.5$, $\sqrt{s}=0.9$ TeV (INEL)
# END PLOT

# BEGIN PLOT /ALICE_2011_S8945144/d03-x01-y02
Title=$\bar p$ tranverse momentum, $|\eta|<0.5$, $\sqrt{s}=0.9$ TeV (INEL)
# END PLOT

# BEGIN PLOT /ALICE_2011_S8945144/d04-x01-y01
Title=Average $p_\perp$ vs mass, $|\eta|<0.5$, $\sqrt{s}=0.9$ TeV (INEL)
XLabel=mass
YLabel=$\langle p_\perp \rangle$ [GeV/c]
# END PLOT