CERN Accelerating science

Article
Title Deuteron production in central Pb+Pb collisions at 158A GeV
Author(s)

Afanasiev, S V ; Anticic, T ; Bächler, J ; Barna, D ; Barnby, L S ; Bartke, Jerzy ; Barton, R A ; Betev, L ; Bialkowska, H ; Billmeier, A ; Blume, C ; Blyth, C O ; Boimska, B ; Bracinik, J ; Brady, F P ; Brun, R ; Buncic, P ; Carr, L ; Cebra, D ; Cooper, G E ; Cramer, J G ; Csató, P ; Eckardt, V ; Eckhardt, F ; Ferenc, D ; Fischer, H G ; Fodor, Z ; Foka, P Y ; Freund, P ; Friese, V ; Ftácnik, J ; Gál, J ; Ganz, R E ; Gazdzicki, M ; Gladysz-Dziadus, E ; Grebieszkow, J ; Harris, J W ; Hegyi, S ; Hlinka, V ; Höhne, C ; Igo, G ; Ivanov, M ; Jacobs, P ; Janik, R ; Jones, P G ; Kadija, K ; Kolesnikov, V I ; Kowalski, M ; Lasiuk, B ; Lévai, Peter ; Malakhov, A I ; Margetis, S ; Markert, C ; Mayes, B W ; Melkumov, G L ; Mischke, A ; Molnár, J ; Nelson, J M ; Odyniec, Grazyna Janina ; Oldenburg, M ; Pálla, G ; Panagiotou, A D ; Petridis, A ; Pikna, M ; Pinsky, L ; Poskanzer, A M ; Prindle, D J ; Pühlhofer, F ; Reid, J G ; Renfordt, R E ; Retyk, W ; Ritter, H G ; Röhrich, D ; Roland, C ; Roland, G ; Rybicki, A ; Sammer, T ; Sandoval, A ; Sann, H ; Semenov, A Yu ; Schäfer, E ; Schmitz, N ; Seyboth, P ; Siklér, F ; Sitár, B ; Skrzypczak, E ; Snellings, R ; Squier, G T A ; Stock, Reinhard ; Strmen, P ; Ströbele, H ; Struck, C ; Susa, T ; Szarka, I ; Szentpétery, I ; Sziklai, J ; Toy, M ; Trainor, T A ; Trentalange, S ; Ullrich, T S ; Varga, D ; Vassiliou, Maria ; Veres, G I ; Vesztergombi, G ; Voloshin, S A ; Vranic, D ; Wang, F ; Weerasundara, D D ; Wenig, S ; Whitten, C ; Xu, N ; Yates, T A ; Yoo, I K ; Zimányi, J

Publication 2000
In: Phys. Lett. B 486 (2000) 22-8
DOI 10.1016/S0370-2693(00)00746-2
Subject category Nuclear Physics
Accelerator/Facility, Experiment CERN SPS ; NA49
Abstract Experimental results on deuteron emission from central Pb+Pb collisions (E/sub beam/=158A GeV, fixed target), obtained by NA49 at the CERN SPS accelerator, are presented. The transverse mass m/sub t/ distribution was measured near mid-rapidity (2.0<y<2.5) in the range of 0<m/sub t/-m/sub 0/<0.9 GeV/c/sup 2/ (0<p/sub t/<2.0 GeV/c) for the 4% most central collisions. An exponential fit gives an inverse slope T/sub d/=(450+or-30) MeV and a yield dN/sub d//dy=0.34+or-0.03. The coalescence factor B/sub 2/(m/sub t/=m/sub 0/)=(3.5+or-1.0).10 /sup -4/ GeV/sup 2/ and its m/sub t/-dependence are determined and discussed in terms of a model that includes the collective expansion of the source created in a collision. The derived Gaussian size parameter R/sub G/ of the emission volume is consistent with earlier HBT results on the source of pion emission. (28 refs).

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