Deuteron production in central Pb+Pb collisions at 158A GeV

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/...

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Detalles Bibliográficos
Autores principales: 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
Lenguaje:eng
Publicado: 2000
Materias:
Nuclear Physics
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(00)00746-2
http://cds.cern.ch/record/500783
Descripción
Sumario: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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