From: Flemming Videbaek (videbaek@rcf.rhic.bnl.gov)
Date: Thu Sep 25 2003 - 08:45:20 EDT
FYI ------------------------------------------------------ Flemming Videbaek Physics Department Brookhaven National Laboratory tlf: 631-344-4106 fax 631-344-1334 e-mail: videbaek@bnl.gov ----- Original Message ----- From: "Timothy Hallman" <hallman@bnl.gov> To: <tkirk@bnl.gov>; <zajc@nevis.columbia.edu>; <videbaek@bnl.gov>; <gunther.roland@cern.ch> Cc: <hallman@bnl.gov> Sent: Wednesday, September 24, 2003 10:13 PM Subject: Release of STAR 200 GeV Spectra Paper | Dear Tom, Bill, Flemming, and Gunther, | | I am pleased to announce STAR's intention to submit a new | paper on "Identified particle distributions in pp and AuAu | collisions roots_NN = 200 GeV" to Physical Review Letters | one week from today. The title and abstract for the paper | are enclosed. | | Sincerely, | | Tim | | | | "Identified particle distributions in pp and AuAu | collisions roots_NN = 200 GeV" | | Transverse mass and rapidity distributions for charged pions, | charged kaons, protons, and antiprotons are reported for | roots_NN = 200 GeV pp and Au+Au collisions at RHIC. The | transverse mass distributions are rapidity independent within | |y| < 0.5, consistent with a boost invariant system in this | rapidity interval. Spectral shapes and relative particle yields | are similar in pp and peripheral Au+Au collisions and change | smoothly to central Au+Au collisions. No centrality dependence | was observed in the kaon and antiproton production rates relative | to the pion production rate from medium central to central | collisions. Chemical and kinetic equilibrium model fits to | our data reveal strong radial flow and relatively long duration | from chemical to kinetic freezeout in central Au+Au collisions. | The chemical freeze-out temperature appears to be independent | of initial conditions at RHIC energies. |
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