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Nuclear modification factors for hadrons at forward and backward rapidities in deuteron-gold collisions at √SNN = 200 GeV

  • S. S. Adler
  • , S. Afanasiev
  • , C. Aidala
  • , N. N. Ajitanand
  • , Y. Akiba
  • , A. Al-Jamel
  • , J. Alexander
  • , K. Aoki
  • , L. Aphecetche
  • , R. Armendariz
  • , S. H. Aronson
  • , R. Averbeck
  • , T. C. Awes
  • , V. Babintsev
  • , A. Baldisseri
  • , K. N. Barish
  • , P. D. Barnes
  • , B. Bassalleck
  • , S. Bathe
  • , S. Batsouli
  • V. Baublis, F. Bauer, A. Bazilevsky, S. Belikov, M. T. Bjorndal, J. G. Boissevain, H. Borel, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, M. P. Comets, P. Constantin, M. Csanád, T. Csörgo, J. P. Cussonneau, D. D'Enterria, K. Das, G. David, F. Deák, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, J. L. Drachenberg, O. Drapier, A. Drees, A. Durum, D. Dutta, V. Dzhordzhadze, Y. V. Efremenko, H. En'yo, B. Espagnon, S. Esumi, D. E. Fields, C. Finck, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukao, S. Y. Fung, S. Gadrat, M. Germain, A. Glenn, M. Gonin, J. Gosset, Y. Goto, R. Granier De Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, H. Å Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki
  • Brookhaven National Laboratory
  • Joint Institute for Nuclear Research
  • Columbia University
  • Stony Brook University
  • High Energy Accelerator Research Organization, Tsukuba
  • RIKEN
  • New Mexico State University
  • Kyoto University
  • SUBATECH
  • Oak Ridge National Laboratory
  • Institute for High Energy Physics
  • CEA Saclay
  • University of California at Riverside
  • Los Alamos National Laboratory
  • University of New Mexico
  • University of Münster
  • Petersburg Nuclear Physics InstituteGatchina
  • Brookhaven National Lab
  • Iowa State University
  • Lawrence Livermore National Laboratory
  • Homi Bhabha National Institute
  • Academia Sinica - Institute of Physics
  • Yonsei University
  • Université Paris-Saclay
  • Eötvös Loránd University
  • Wigner Research Centre for Physics
  • Florida State University
  • Universidade de São Paulo
  • Abilene Christian University
  • CNRS-IN2P3
  • University of Tennessee
  • University of Tsukuba
  • Russian Research Centre Kurchatov Institute
  • Weizmann Institute of Science
  • Université Blaise Pascal
  • Vanderbilt University
  • University of Illinois at Urbana-Champaign
  • Lund University
  • Hiroshima University
  • The University of Tokyo

Research output: Contribution to journalArticlepeer-review

87 Scopus citations

Abstract

We report on charged hadron production in deuteron-gold reactions at √SNN = 200 GeV. Our measurements in the deuteron direction cover 1.4 < η < 2.2, referred to as forward rapidity, and in the gold direction -2.0 < η < -1.4, referred to as backward rapidity, and a transverse momentum range PT = 0.5-.0 GeV/c. We compare the relative yields for different deuteron-gold collision centrality classes. We observe a suppression relative to binary collision scaling at forward rapidity, sensitive to low momentum fraction (x) partons in the gold nucleus, and an enhancement at backward rapidity, sensitive to high momentum fraction partons in the gold nucleus.

Original languageEnglish
Article number082302
Pages (from-to)1-6
Number of pages6
JournalPhysical Review Letters
Volume94
Issue number8
DOIs
StatePublished - Mar 4 2005

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