From: Flemming Videbaek (videbaek@sgs1.hirg.bnl.gov)
Date: Tue May 27 2003 - 11:54:54 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: "William A. Zajc" <zajc@nevis.columbia.edu> To: "Thomas Kirk" <tkirk@bnl.gov>; <Busza@mit.edu>; <Hallman@bnl.gov>; <Videbaek@bnl.gov> Sent: Friday, May 23, 2003 9:31 PM Subject: New PHENIX Paper on Proton and Anti-Proton yields in Au+Au Collisions at 200 GeV | Dear Tom, Wit, Tim and Flemming: | | I am pleased to announce that our results on the scaling properties of | proton and anti-proton yields from 200 GeV Au-Au collisions will be | submitted to Physical Review Letters in one week. The title and abstract | are included below. The results are very similar to those presented at | last year's DNP conference (and subsequent venues). | | Best regards, | | Bill | | ------------------------------------------------------------------------ | ----------------------------- | | Scaling properties of proton and anti-proton production in | $\snn=200$\,GeV Au$+$Au collisions | | We report on the yield of protons and anti-protons, as a function of | centrality and transverse momentum, in Au$+$Au collisions | at $\snn$ = 200 GeV measured at mid-rapidity by the PHENIX experiment | at RHIC. In central collisions at intermediate transverse momenta | ($1.5 < \pt < 4.5$\,GeV/$c$) a significant fraction of all produced | particles are protons and anti-protons. They show a scaling behavior | different from that of pions. The $\pbar/\pi$ and $p/\pi$ ratios are | enhanced compared to peripheral Au+Au, p+p and $e^{+}e^{-}$ collisions. | This enhancement is limited to $\pt < 5$\,GeV/$c$ as deduced from the | ratio of charged hadrons to $\piz$ measured in the range | $1.5 < \pt < 9$\,GeV/$c$. |
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