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Rapidity dependence of antiproton-to-proton ratios in Au+Au collisions at square root of (sNN) = 130 GeV | I G Bearden
; D Beavis
; C Besliu
; Y Blyakhman
; J Brzychczyk
; B Budick
; H Bøggild
; C Chasman
; C H Christensen
; P Christiansen
; J Cibor
; R Debbe
; J J Gaardhøje
; K Grotowski
; K Hagel
; O Hansen
; A Holm
; A K Holme
; H Ito
; E Jakobsen
; A Jipa
; J I Jørdre
; F Jundt
; C E Jørgensen
; T Keutgen
; E J Kim
; T Kozik
; T M Larsen
; J H Lee
; Y K Lee
; G L Løvhøiden
; Z Majka
; A Makeev
; B McBreen
; M Murray
; J Natowitz
; B S Nielsen
; K Olchanski
; J Olness
; D Ouerdane
; R Planeta
; F Rami
; D Röhrich
; B H Samset
; S J Sanders
; R A Sheetz
; Z Sosin
; P Staszel
; T F Thorsteinsen
; T S Tveter
; F Videbaek
; R Wada
; A Wieloch
; I S Zgura
; | Date: |
10 Sep 2001 | Journal: | Phys Rev Lett, 87 (11), 112305 | Abstract: | Measurements, with the BRAHMS detector, of the antiproton-to-proton ratio at midrapidities and forward rapidities, are presented for Au+Au reactions at square root of [s(NN)] = 130 GeV, and for three different collision centralities. For collisions in the 0%-40% centrality range, we find N(&pmacr;)/N(p) = 0.64+/-0.04((stat))+/-0.06((syst)) at y approximately 0, 0.66+/-0.03+/-0.06 at y approximately 0.7, and 0.41+/-0.04+/-0.06 at y approximately 2. The ratios are found to be nearly independent of collision centrality and transverse momentum. The antiproton and proton rapidity densities vary differently with rapidity, and indicate a significant degree of collision transparency, although a net-baryon free midrapidity plateau (Bjorken limit) is not yet reached. | Source: | PubMed, pmid11531519 | Services: | Forum | Review | Favorites |
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