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3 results on '"J., Cibor"'

1. Rapidity dependent strangeness measurements in BRAHMS experiment at RHIC

Author

J H Lee, (for the BRAHMIS Collaboration), I G Bearden, D Beavis, C Besliu, B Budick, H Bøggild, C Chasman, C H Christensen, P Christiansen, J Cibor, R Debbe, E Enger, J J Gaardhøje, M Germinario, K Hagel, O Hansen, A Holm, H Ito, E Jakobsen, A Jipa, F Jundt, J I Jørdre, C E Jørgensen, R Karabowicz, E J Kim, T Kozik, T M Larsen, Y K Lee, G Løvhøiden, Z Majka, A Makeev, M Mikelsen, M Murray, J Natowitz, B S Nielsen, J Norris, K Olchanski, J Olness, D Ouerdane, R P aneta, F Rami, C Ristea, D Röhrich, B H Samset, D Sandberg, S J Sanders, P Staszel, T S Tveter, F Videbæk, R Wada, A Wieloch, Z Yin, and I S Zgura

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Pion, Meson, Hadron, Transverse mass, Rapidity, Strangeness, Nuclear Experiment, Charged particle
Abstract

Particle production of charged kaons in central Au+Au collisions at has been studied as a function of rapidity by the BRAHMS collaboration at RHIC. The kaon spectral shapes are described well by an exponential in transverse mass for the rapidity range of 0 ≤ yK ≤ 3.3 with smoothly decreasing inverse slopes as the rapidity increases. For the charged kaon to pion ratios, while there is no significant rapidity dependence for the K+/π+ ratio, the K−/π− ratio shows a significant decrease from y ≈ 1 towards higher rapidities. The systematics of K−/K+ and ratios in the measured rapidity range demonstrates a strongly correlated behaviour which can be described by thermal–statistical models.

Published
2003

2. Results from the BRAHMS experiment at RHIC

Author

D R$ouml$hrich for the BRAHMS Collaboration, I G Bearden, D Beavis, C Besliu, Y Blyakhman, J Brzychczyk, B Budick, H B$oslash$ggild, C Chasman, C H Christensen, P Christiansen, J Cibor, R Debbe, J J Gaardh$oslash$je, M Germinario, K Grotowski, K Hagel, O Hansen, A Holm, A K Holme, H Ito, E Jakobsen, A Jipa, J I Jordre, F Jundt, C E J$oslash$rgensen, T Keutgen, E J Kim, T Kozik, T M Larsen, J H Lee, Y K Lee, G L$oslash$vh$oslash$iden, Z Majka, A Makeev, B McBreen, M Murray, J Natowitz, B S Nielsen, K Olchanski, J Olness, D Ouerdane, R P$lslash$aneta, F Rami, D R$ouml$hrich, B Samset, D Sandberg, S Sanders, R A Sheetz, Z Sosin, P Staszel, T F Thorsteinsen, T S Tveter, F Videb$aelig$k, R Wada, A Wieloch, and I S Zgura

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Antiproton, Pseudorapidity, Rapidity, Multiplicity (chemistry), Relativistic Heavy Ion Collider, Charged particle, Late summer
Abstract

Results from the BRAHMS Collaboration for the inaugural physics run with the relativistic heavy ion collider (RHIC), Au + Au collisions at √sNN = 130 GeV in the late summer of 2000, and some results of the very first data from the summer of 2001 at √sNN = 200 GeV are presented. Here the main focus is on the determination of the pseudorapidity distribution of charged particles as a function of collision centrality and on the measurement of the antiproton to proton and the K− to K+ ratios as a function of rapidity. The pseudorapidity density at midrapidity reaches dN(ch)/dη = 553 ± 36 for the most central collisions (0–5%) at √sNN = 130 GeV; the corresponding number for a higher energy is dN(ch)/dη = 632 ± 36, demonstrating an increase in multiplicity of about 14%. The measured antiproton/proton ratios peak at midrapidity around N()/N(p) = 0.64 ± 0.06 and drop to 0.41 ± 0.04 at y ≈ 2 for √sNN = 130 GeV reactions; the K− to K+ ratios are 0.90 ± 0.06 (y ≈ 0) and 0.83 ± 0.1 (y ≈ 2.5).

Published
2002

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