Dear friends
Working GMT+1 I have the pleasure of relaying the spokesmans message to the
RHIC management and to the spokespersons
of the other collaborations on the 200GeV multiplicity paper from BRAHMS.
Already a large fraction of the BRAHMS collaborators have contributed with
numerous comments to the manuscript, which
is being continuously improved and updated. At this rate of communication
and improvement I see no reason that we
should not be able to submit to PRL at the end of next week.
You can continously monitor the status of the manuscript on:
pii3.brahms.bnl.gov/~kansas/dndeta01/
The latest version is always called dndeta01_2col.ps.
There are 5 figures: fig1-5.eps.
Bravo to - in particular- to Hiro and Steve for a great analysis, that puts
BRAHMS at the forefront of the 200GeV physics at RHIC.
cheers
JJ
________________________________________-
Sent: Wednesday, November 21, 2001 5:38 PM
To: Thomas Kirk; Bill Zajc; John Harris; Witt Buzsa
Subject: announchement brahms publication
Dear Colleagues
The Brahms collaboration has now completed the analysis of the charged
particle multiplicity
data taken early in the 200 GeV Au-Au run, and plans to submit a paper on
these results
to PRL at the end of next week. S.Sanders presented the data and analysis
in a near
final form at the DNP meeting in Hawaii.
The title and abstract is as follows.
Title:
Pseudorapidity distributions of charged particles from Au Au collisions
at the maximum RHIC energy.
Abstract:
We present charged particle densities as a function of pseudorapidity and
collision
centrality for the $^{197}$Au+$^{197}$Au reaction
at $\sqrt{s_{NN}}$=200 GeV, the maximum energy for RHIC.
The charged particle multiplicity for the 5\% most central events is
632 $\pm$ 1 (stat) $\pm$55 (syst), i.e. a 14\% increase relative to
sqrt{s_{NN}}$=130 GeV collisions. The total multiplicity of charged
particles for $-4.7\le \eta \le 4.7$ is 4630 $\pm$370, an increase
by 20\% over the lower energy. The data show an increase from 2.9 to
3.7 in the production of charged particles per pair of participant
nucleons from peripheral (40-50\%) to central (0-5\%) collisions around
midrapidity.
These results constrain current models based on high density
QCD gluon saturation and on the superposition of particle production
from soft hadronic and hard partonic collisions.
Best regards
and a happy Thanksgiving
Flemming
_______________________________________________
________________________________
Jens Jørgen Gaardhøje
Assoc. prof. Dr. Scient.
Chair Ph.D: school of Physics NBI.f.AFG.
(secretariat. 35 32 04 41)
Chair science committee. UNESCO Natl. Commission.
(secretariat. 33 92 52 16)
Office: Niels Bohr Institute, Blegdamsvej 17,
2100, Copenhagen, Denmark.
Tlf: (+45) 35 32 53 09
Fax: (+45) 35 32 50 16
________________________________
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