FYI ---------------------------------------------------------------- Flemming Videbaek Physics Department Brookhaven National Laboratory e-mail: videbaek@bnl.gov phone: 631-344-4106 ----- Original Message ----- From: "Mark D. Baker" <baker@rcf.rhic.bnl.gov> To: <tkirk@bnl.gov> Cc: <zajc@nevis.columbia.edu>; <hallman@bnl.gov>; <videbaek@bnl.gov>; <phobos@mit.edu> Sent: Tuesday, May 18, 2004 5:51 PM Subject: Phobos paper on 20/200 GeV midrapidity dN/deta comparison > Tom, > > I am pleased to announce our intention to submit a paper to PRC-RC > in one week. The preliminary version of this result was originally > shown at Quark Matter 2002. The final result will be presented at a seminar > next week. The title and abstract can be found below. > > Mark > > "Collision geometry scaling of Au+Au pseudorapidity density from > $\sqrtsnn$ =19.6 to 200 GeV" > > The centrality dependence of the midrapidity charged particle multiplicity > in Au+Au collisions at $\sqrtsnn$ = 19.6 and 200 GeV is presented. Within > a simple model, the fraction of hard (scaling with number of binary > collisions) to soft (scaling with number of participant pairs) > interactions is consistent with a value of x = 0.13 +/- 0.01 (stat) > +/- 0.05 (syst) at both energies. The experimental results at both > energies, scaled by inelastic p($\pbar$) + p collision data, agree within > systematic errors. The ratio of the data was found not to depend on > centrality over the studied range and yields a simple linear scale factor > of R(200/19.6) = 2.03 +/- 0.02 (stat) +/- 0.05 (syst). > _______________________________________________ Brahms-l mailing list Brahms-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-lReceived on Wed May 19 09:45:47 2004
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