Proton and deuteron production in Au+Au reactions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>1</mml:mn><mml:mn>1</mml:mn><mml:mo>.</mml:mo><mml:mn>6</mml:mn><mml:mi>A</mml:mi><mml:mi> </mml:mi><mml:mi mathvariant="normal">GeV</mml:mi><mml:mo>/</mml:mo><mml:mi>c</mml:mi></mml:math>
L. AhleMassachusetts Institute of Technology, Cambridge, Massachusets 02139Y. AkibaHigh Energy Accelerator Research Organization (KEK), Tanashi-branch, (Tanashi) Tokyo 188, JapanK. AshktorabBrookhaven National Laboratory, Upton, New York 11973M. D. BakerMassachusetts Institute of Technology, Cambridge, Massachusets 02139D. BeavisBrookhaven National Laboratory, Upton, New York 11973H. C. BrittLawrence Livermore National Laboratory, Livermore, California 94550J. ChangUniversity of California at Riverside, Riverside, California 92507C. ChasmanBrookhaven National Laboratory, Upton, New York 11973Z. ChenBrookhaven National Laboratory, Upton, New York 11973C.Y. ChiColumbia University, New York 10027Nevis Laboratories, Irvington, New York 10533Y. Y. ChuBrookhaven National Laboratory, Upton, New York 11973V. CiancioloMassachusetts Institute of Technology, Cambridge, Massachusets 02139B. ColeColumbia University, New York 10027Nevis Laboratories, Irvington, New York 10533H. J. CrawfordUniversity of California, Space Sciences Laboratory, Berkeley, California 94720J. B. CummingBrookhaven National Laboratory, Upton, New York 11973R. DebbeBrookhaven National Laboratory, Upton, New York 11973J. C. DunlopMassachusetts Institute of Technology, Cambridge, Massachusets 02139W. EldredgeUniversity of California at Riverside, Riverside, California 92507J. EngelageUniversity of California, Space Sciences Laboratory, Berkeley, California 94720S.-Y. FungUniversity of California at Riverside, Riverside, California 92507E. Garcı́aUniversity of Maryland, College Park, Maryland 20742S. GushueBrookhaven National Laboratory, Upton, New York 11973H. HamagakiCenter for Nuclear Study, School of Science, University of Tokyo, Tanashi, Tokyo 188, JapanL.F. HansenLawrence Livermore National Laboratory, Livermore, California 94550R. HayanoDepartment of Physics, University of Tokyo, Tokyo 113, JapanG. HeintzelmanMassachusetts Institute of Technology, Cambridge, Massachusets 02139E. G. JuddUniversity of California, Space Sciences Laboratory, Berkeley, California 94720J. H. KangYonsei University, Seoul 120-749, KoreaE. J. KimBrookhaven National Laboratory, Upton, New York 11973A. KumagaiUniversity of Tsukuba, Tsukuba, Ibaraki 305, JapanK. KuritaUniversity of Tsukuba, Tsukuba, Ibaraki 305, JapanJ.-H. LeeBrookhaven National Laboratory, Upton, New York 11973Jon C. LukeLawrence Livermore National Laboratory, Livermore, California 94550Y. MiakeUniversity of Tsukuba, Tsukuba, Ibaraki 305, JapanA. C. MignereyUniversity of Maryland, College Park, Maryland 20742B. MoskowitzBrookhaven National Laboratory, Upton, New York 11973M. MoulsonColumbia University, New York 10027Nevis Laboratories, Irvington, New York 10533C. MüentzBrookhaven National Laboratory, Upton, New York 11973S. NagamiyaHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305, JapanM.N. NamboodiriLawrence Livermore National Laboratory, Livermore, California 94550C. A. OgilvieMassachusetts Institute of Technology, Cambridge, Massachusets 02139J. W. OlnessBrookhaven National Laboratory, Upton, New York 11973L. P. RemsbergBrookhaven National Laboratory, Upton, New York 11973H. SakoDepartment of Physics, University of Tokyo, Tokyo 113, JapanT. C. SangsterLawrence Livermore National Laboratory, Livermore, California 94550R. SetoUniversity of California at Riverside, Riverside, California 92507J. SheaUniversity of Maryland, College Park, Maryland 20742K. ShigakiDepartment of Physics, University of Tokyo, Tokyo 113, JapanR. A. SoltzMassachusetts Institute of Technology, Cambridge, Massachusets 02139S. G. SteadmanMassachusetts Institute of Technology, Cambridge, Massachusets 02139G. S. F. StephansMassachusetts Institute of Technology, Cambridge, Massachusets 02139M. J. TannenbaumBrookhaven National Laboratory, Upton, New York 11973J. H. ThomasLawrence Livermore National Laboratory, Livermore, California 94550S. Ueno-HayashiUniversity of Tsukuba, Tsukuba, Ibaraki 305, JapanF. VidebækBrookhaven National Laboratory, Upton, New York 11973F. WangColumbia University, New York 10027Nevis Laboratories, Irvington, New York 10533Y. WuColumbia University, New York 10027Nevis Laboratories, Irvington, New York 10533H. XiangUniversity of California at Riverside, Riverside, California 92507G. XuUniversity of California at Riverside, Riverside, California 92507K. YagiUniversity of Tsukuba, Tsukuba, Ibaraki 305, JapanH. YaoMassachusetts Institute of Technology, Cambridge, Massachusets 02139W. A. ZajcColumbia University, New York 10027Nevis Laboratories, Irvington, New York 10533F. ZhuBrookhaven National Laboratory, Upton, New York 11973
1999lv
ABI
Аннотация
Proton and deuteron distributions from $11.6A \mathrm{GeV}/c$ Au + Au collisions measured by the E802 Collaboration in experiment E-866 are presented. The invariant yield of protons and deuterons is studied as a function of the transverse mass for different cuts of rapidity and centrality. At low ${m}_{t}\ensuremath{-}{m}_{0}$ the proton and deuteron invariant spectra deviate from a single exponential shape. The average ${m}_{t}$ as function of centrality and rapidity is used to explore the effect of collective transverse flow in the reaction. The ratio of the deuteron to squared proton yield as a function of transverse momentum, rapidity, and centrality is used to probe the coalescence model of deuteron production. This ratio is constant as a function of rapidity only for the most central cuts and decreases with the centrality for every rapidity cut. The ratio of the differential cross section of the deuteron to the squared differential cross section of the proton, for the most central cut, is not constant as a function of ${m}_{t}\ensuremath{-}{m}_{0}.$
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