Spectator nucleons in Pb+Pb collisions at 158 A•GeV

被引：33
|
作者：
Appelshauser, H [1 ]
Bachler, J
Bailey, SJ
Barnby, LS
Bartke, J
Barton, RA
Bialkowska, H
Blyth, CO
Bock, R
Bormann, C
Brady, FP
Brockmann, R
Buncic, N
Buncic, P
Caines, HL
Cebra, D
Chan, P
Cooper, GE
Cramer, JG
Cramer, PB
Csato, P
Dunn, J
Eckardt, V
Eckhardt, F
Ferguson, MI
Fischer, HG
Flierl, D
Fodor, Z
Foka, P
Freund, P
Friese, V
Fuchs, M
Gabler, F
Gal, J
Gazdzicki, M
Gladysz, E
Gorodetsky, P
Grebieszkow, J
Gunther, J
Harris, JW
Hegyi, S
Henkel, T
Hill, LA
Huang, I
Hummler, H
Igo, G
Irmscher, D
Jacobs, P
Jones, PG
Kadija, K
机构：
[1] Univ Athens, Dept Phys, Athens, Greece
[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[3] Univ Birmingham, Birmingham, W Midlands, England
[4] KFKI Res Inst Particle & Nucl Phys, Budapest, Hungary
[5] CERN, Geneva, Switzerland
[6] Inst Nucl Phys, Krakow, Poland
[7] Gesell Schwerionenforsch GmbH, Darmstadt, Germany
[8] Univ Calif Davis, Davis, CA USA
[9] Joint Inst Nucl Res, Dubna, Russia
[10] Univ Frankfurt, Fachbereich Phys, D-6000 Frankfurt, Germany
[11] Univ Calif Los Angeles, Los Angeles, CA USA
[12] Univ Marburg, Fachbereich Phys, D-3550 Marburg, Germany
[13] Max Planck Inst Phys, D-80805 Munich, Germany
[14] Inst Nucl Studies, PL-00681 Warsaw, Poland
[15] Univ Warsaw, Inst Expt Phys, Warsaw, Poland
[16] Univ Washington, Nucl Phys Lab, Seattle, WA 98195 USA
[17] Yale Univ, New Haven, CT USA
[18] Rudjer Boskovic Inst, Zagreb, Croatia
来源：
EUROPEAN PHYSICAL JOURNAL A | 1998年 / 2卷 / 04期
关键词：
D O I：
10.1007/s100500050135
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The composition of forward-going projectile spectator matter in fixed-target Pb+Pb collisions at 158 A.GeV at the CERN SPS has been studied as a function of centrality. The data were measured with the NA49 veto calorimeter. We observe that forward-going spectator matter in central collisions consists of 9 neutrons, 7 protons, and half a deuteron on average. At large impact parameters most spectator nucleons are bound in fragments. The relative resolution of the average impact parameter derived from the measurement of spectator neutrons is roughly 19% in the range from zero to half maximum impact parameters.
引用
收藏
页码：383 / 390
页数：8
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