Results from the BRAHMS experiment at RHIC

D. Röhrich, 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, M. Germinario, K. Grotowski, K. Hagel, O. Hansen, A. Holm, A. K. Holme & 37 others H. Ito, E. Jakobsen, A. Jipa, J. I. Jordre, F. Jundt, C. E. Jørgensen, T. Keutgen, E. J. Kim, T. Kozik, T. M. Larsen, J. H. Lee, Y. K. Lee, G. Løvhøiden, Z. Majka, A. Makeev, B. McBreen, M. Murray, J. Natowitz, B. S. Nielsen, K. Olchanski, J. Olness, D. Ouerdane, R. Płaneta, F. Rami, D. Röhrich, B. Samset, D. Sandberg, S. Sanders, R. A. Sheetz, Z. Sosin, P. Staszel, T. F. Thorsteinsen, T. S. Tveter, F. Videbæk, R. Wada, A. Wieloch, I. S. Zgura

    Research output: Contribution to journalArticle

    Abstract

    Results from the BRAHMS Collaboration for the inaugural physics run with the relativistic heavy ion collider (RHIC), Au + Au collisions at √s NN = 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(p̄)/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).

    Original languageEnglish (US)
    Pages (from-to)1841-1851
    Number of pages11
    JournalJournal of Physics G: Nuclear and Particle Physics
    Volume28
    Issue number7
    DOIs
    StatePublished - Jul 2002

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    heavy ions
    antiprotons
    collisions
    summer
    protons
    charged particles
    physics
    energy

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Nuclear and High Energy Physics

    Cite this

    Röhrich, D., Bearden, I. G., Beavis, D., Besliu, C., Blyakhman, Y., Brzychczyk, J., ... Zgura, I. S. (2002). Results from the BRAHMS experiment at RHIC. Journal of Physics G: Nuclear and Particle Physics, 28(7), 1841-1851. https://doi.org/10.1088/0954-3899/28/7/338

    Results from the BRAHMS experiment at RHIC. / Röhrich, D.; Bearden, I. G.; Beavis, D.; Besliu, C.; Blyakhman, Y.; Brzychczyk, J.; Budick, B.; Bøggild, H.; Chasman, C.; Christensen, C. H.; Christiansen, P.; Cibor, J.; Debbe, R.; Gaardhøje, J. J.; Germinario, M.; Grotowski, K.; Hagel, K.; Hansen, O.; Holm, A.; Holme, A. K.; Ito, H.; Jakobsen, E.; Jipa, A.; Jordre, J. I.; Jundt, F.; Jørgensen, C. E.; Keutgen, T.; Kim, E. J.; Kozik, T.; Larsen, T. M.; Lee, J. H.; Lee, Y. K.; Løvhøiden, G.; Majka, Z.; Makeev, A.; McBreen, B.; Murray, M.; Natowitz, J.; Nielsen, B. S.; Olchanski, K.; Olness, J.; Ouerdane, D.; Płaneta, R.; Rami, F.; Röhrich, D.; Samset, B.; Sandberg, D.; Sanders, S.; Sheetz, R. A.; Sosin, Z.; Staszel, P.; Thorsteinsen, T. F.; Tveter, T. S.; Videbæk, F.; Wada, R.; Wieloch, A.; Zgura, I. S.

    In: Journal of Physics G: Nuclear and Particle Physics, Vol. 28, No. 7, 07.2002, p. 1841-1851.

    Research output: Contribution to journalArticle

    Röhrich, D, Bearden, IG, Beavis, D, Besliu, C, Blyakhman, Y, Brzychczyk, J, Budick, B, Bøggild, H, Chasman, C, Christensen, CH, Christiansen, P, Cibor, J, Debbe, R, Gaardhøje, JJ, Germinario, M, Grotowski, K, Hagel, K, Hansen, O, Holm, A, Holme, AK, Ito, H, Jakobsen, E, Jipa, A, Jordre, JI, Jundt, F, Jørgensen, CE, Keutgen, T, Kim, EJ, Kozik, T, Larsen, TM, Lee, JH, Lee, YK, Løvhøiden, G, Majka, Z, Makeev, A, McBreen, B, Murray, M, Natowitz, J, Nielsen, BS, Olchanski, K, Olness, J, Ouerdane, D, Płaneta, R, Rami, F, Röhrich, D, Samset, B, Sandberg, D, Sanders, S, Sheetz, RA, Sosin, Z, Staszel, P, Thorsteinsen, TF, Tveter, TS, Videbæk, F, Wada, R, Wieloch, A & Zgura, IS 2002, 'Results from the BRAHMS experiment at RHIC', Journal of Physics G: Nuclear and Particle Physics, vol. 28, no. 7, pp. 1841-1851. https://doi.org/10.1088/0954-3899/28/7/338
    Röhrich D, Bearden IG, Beavis D, Besliu C, Blyakhman Y, Brzychczyk J et al. Results from the BRAHMS experiment at RHIC. Journal of Physics G: Nuclear and Particle Physics. 2002 Jul;28(7):1841-1851. https://doi.org/10.1088/0954-3899/28/7/338
    Röhrich, D. ; Bearden, I. G. ; Beavis, D. ; Besliu, C. ; Blyakhman, Y. ; Brzychczyk, J. ; Budick, B. ; Bøggild, H. ; Chasman, C. ; Christensen, C. H. ; Christiansen, P. ; Cibor, J. ; Debbe, R. ; Gaardhøje, J. J. ; Germinario, M. ; Grotowski, K. ; Hagel, K. ; Hansen, O. ; Holm, A. ; Holme, A. K. ; Ito, H. ; Jakobsen, E. ; Jipa, A. ; Jordre, J. I. ; Jundt, F. ; Jørgensen, C. E. ; Keutgen, T. ; Kim, E. J. ; Kozik, T. ; Larsen, T. M. ; Lee, J. H. ; Lee, Y. K. ; Løvhøiden, G. ; Majka, Z. ; Makeev, A. ; McBreen, B. ; Murray, M. ; Natowitz, J. ; Nielsen, B. S. ; Olchanski, K. ; Olness, J. ; Ouerdane, D. ; Płaneta, R. ; Rami, F. ; Röhrich, D. ; Samset, B. ; Sandberg, D. ; Sanders, S. ; Sheetz, R. A. ; Sosin, Z. ; Staszel, P. ; Thorsteinsen, T. F. ; Tveter, T. S. ; Videbæk, F. ; Wada, R. ; Wieloch, A. ; Zgura, I. S. / Results from the BRAHMS experiment at RHIC. In: Journal of Physics G: Nuclear and Particle Physics. 2002 ; Vol. 28, No. 7. pp. 1841-1851.
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    abstract = "Results from the BRAHMS Collaboration for the inaugural physics run with the relativistic heavy ion collider (RHIC), Au + Au collisions at √s NN = 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(p̄)/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).",
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    T1 - Results from the BRAHMS experiment at RHIC

    AU - Röhrich, D.

    AU - Bearden, I. G.

    AU - Beavis, D.

    AU - Besliu, C.

    AU - Blyakhman, Y.

    AU - Brzychczyk, J.

    AU - Budick, B.

    AU - Bøggild, H.

    AU - Chasman, C.

    AU - Christensen, C. H.

    AU - Christiansen, P.

    AU - Cibor, J.

    AU - Debbe, R.

    AU - Gaardhøje, J. J.

    AU - Germinario, M.

    AU - Grotowski, K.

    AU - Hagel, K.

    AU - Hansen, O.

    AU - Holm, A.

    AU - Holme, A. K.

    AU - Ito, H.

    AU - Jakobsen, E.

    AU - Jipa, A.

    AU - Jordre, J. I.

    AU - Jundt, F.

    AU - Jørgensen, C. E.

    AU - Keutgen, T.

    AU - Kim, E. J.

    AU - Kozik, T.

    AU - Larsen, T. M.

    AU - Lee, J. H.

    AU - Lee, Y. K.

    AU - Løvhøiden, G.

    AU - Majka, Z.

    AU - Makeev, A.

    AU - McBreen, B.

    AU - Murray, M.

    AU - Natowitz, J.

    AU - Nielsen, B. S.

    AU - Olchanski, K.

    AU - Olness, J.

    AU - Ouerdane, D.

    AU - Płaneta, R.

    AU - Rami, F.

    AU - Röhrich, D.

    AU - Samset, B.

    AU - Sandberg, D.

    AU - Sanders, S.

    AU - Sheetz, R. A.

    AU - Sosin, Z.

    AU - Staszel, P.

    AU - Thorsteinsen, T. F.

    AU - Tveter, T. S.

    AU - Videbæk, F.

    AU - Wada, R.

    AU - Wieloch, A.

    AU - Zgura, I. S.

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