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Titolo:
Rapidity dependence of antiproton-to-proton ratios in Au+Au collisions at root s(NN)=130 GeV - art. no. 112305
Autore:
Bearden, IG; Beavis, D; Besliu, C; Blyakhman, Y; Brzychczyk, J; Budick, B; Boggild, H; Chasman, C; Christensen, CH; Christiansen, P; Cibor, J; Debbe, R; Gaardhoje, JJ; Grotowski, K; Hagel, K; Hansen, O; Holm, A; Holme, AK; Ito, H; Jakobsen, E; Jipa, A; Jordre, JI; Jundt, F; Jorgensen, CE; Keutgen, T; Kim, EJ; Kozik, T; Larsen, TM; Lee, JH; Lee, YK; Lovhoiden, GL; Majka, Z; Makeev, A; McBreen, B; Murray, M; Natowitz, J; Nielsen, BS; Olchanski, K; Olness, J; Ouerdane, D; Planeta, R; Rami, F; Rohrich, D; Samset, BH; Sanders, SJ; Sheetz, RA; Sosin, Z; Staszel, P; Thorsteinsen, TF; Tveter, TS; Videbaek, F; Wada, R; Wieloch, A; Zgura, IS;
Indirizzi:
Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark Univ Copenhagen Copenhagen Denmark DK-2100 , DK-2100 Copenhagen, Denmark Brookhaven Natl Lab, Upton, NY 11973 USA Brookhaven Natl Lab Upton NY USA11973 aven Natl Lab, Upton, NY 11973 USA Inst Rech Subatom, Strasbourg, France Inst Rech Subatom Strasbourg France st Rech Subatom, Strasbourg, France Univ Strasbourg 1, Strasbourg, France Univ Strasbourg 1 Strasbourg France iv Strasbourg 1, Strasbourg, France Inst Nucl Phys, Krakow, Poland Inst Nucl Phys Krakow PolandInst Nucl Phys, Krakow, Poland Jagiellonian Univ, Krakow, Poland Jagiellonian Univ Krakow PolandJagiellonian Univ, Krakow, Poland Johns Hopkins Univ, Baltimore, MD 21218 USA Johns Hopkins Univ Baltimore MD USA 21218 s Univ, Baltimore, MD 21218 USA NYU, New York, NY 10003 USA NYU New York NY USA 10003NYU, New York, NY 10003 USA Texas A&M Univ, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 M Univ, College Stn, TX 77843 USA Univ Bergen, Dept Phys, Bergen, Norway Univ Bergen Bergen NorwayUniv Bergen, Dept Phys, Bergen, Norway Univ Bucharest, Bucharest, Romania Univ Bucharest Bucharest RomaniaUniv Bucharest, Bucharest, Romania Univ Kansas, Lawrence, KS 66045 USA Univ Kansas Lawrence KS USA 66045Univ Kansas, Lawrence, KS 66045 USA Univ Oslo, Dept Phys, Oslo, Norway Univ Oslo Oslo NorwayUniv Oslo, Dept Phys, Oslo, Norway
Titolo Testata:
PHYSICAL REVIEW LETTERS
fascicolo: 11, volume: 8711, anno: 2001,
pagine: 2305 -
SICI:
0031-9007(20010910)8711:11<2305:RDOARI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEUS-NUCLEUS COLLISIONS; MIDRAPIDITY; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Bearden, IG Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark Univ Copenhagen Blegdamsvej 17 Copenhagen Denmark DK-2100 ark
Citazione:
I.G. Bearden et al., "Rapidity dependence of antiproton-to-proton ratios in Au+Au collisions at root s(NN)=130 GeV - art. no. 112305", PHYS REV L, 8711(11), 2001, pp. 2305

Abstract

Measurements, with the BRAHMS detector, of the antiproton-to-proton ratio at midrapidities and forward rapidities, are presented for Au + Au reactions at roots(NN) = 130 GeV, and for three different collision centralities. For collisions in the 0%-40% centrality range, we find N((p) over bar)/N(p) = 0.64 +/- 0.04((stat)) +/- 0.06((syst)) at y approximate to 0, 0.66 +/- 0.03 +/- 0.06 at y approximate to 0.7, and 0.41 +/- 0.04 +/- 0.06 at y approximate to 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 (Bjorkenlimit) is not yet reached.

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Documento generato il 02/12/20 alle ore 17:55:24