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

Authors
Afanasiev, SV Anticic, T Bachler, J Barna, D Barnby, LS Bartke, J Barton, RA Betev, L Bialkowska, H Billmeier, A Blume, C Blyth, CO Boimska, B Bracinik, J Brady, FP Brun, R Buncic, P Carr, L Cebra, D Cooper, GE Cramer, JG Csato, P Eckardt, V Eckhardt, F Ferenc, D Fischer, HG Fodor, Z Foka, P Freund, P Friese, V Ftacnik, J Gal, J Ganz, R Gazdzicki, M Gladysz, E Grebieszkow, J Harris, JW Hegyi, S Hlinka, V Hohne, C Igo, G Ivanov, M Jacobs, P Janik, R Jones, PG Kadija, K Kolesnikov, VI Kowalski, M Lasiuk, B Levai, P Malakhov, AI Margetis, S Markert, C Mayes, BW Melkumov, GL Mischke, A Molnar, J Nelson, JM Odyniec, G Oldenburg, MD Palla, G Panagiotou, AD Petridis, A Pikna, M Pinsky, L Poskanzer, AM Prindle, DJ Puhlhofer, F Reid, JG Renfordt, R Retyk, W Ritter, HG Rohrich, D Roland, C Roland, G Rybicki, A Sammer, T Sandoval, A Sann, H Semenov, AY Schafer, E Schmitz, N Seyboth, P Sikler, F Sitar, B Skrzypczak, E Snellings, R Squier, GTA Stock, R Strmen, P Strobele, H Struck, C Susa, T Szarka, I Szentpetery, I Sziklai, J Toy, M Trainor, TA Trentalange, S Ullrich, T Varga, D Vassiliou, M Veres, GI Vesztergombi, G Voloshin, S Vranic, D Wang, F Weerasundara, DD Wenig, S Whitten, C Xu, N Yates, TA Yoo, IK Zimanyi, J
Citation
Sv. Afanasiev et al., Deuteron production in central Pb plus Pb collisions at 158A GeV, PHYS LETT B, 486(1-2), 2000, pp. 22-28
Citations number
49
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
486
Issue
1-2
Year of publication
2000
Pages
22 - 28
Database
ISI
SICI code
0370-2693(20000727)486:1-2<22:DPICPP>2.0.ZU;2-V
Abstract
Experimental results on deuteron emission from central Pb + Pb collisions ( E-beam = 158A GeV, fixed target), obtained by NA49 at the CERN SPS accelera tor, are presented. The transverse mass in, distribution was measured near mid-rapidity (2.0 < y < 2.5) in the range of 0 < m(t) - m(0) < 0.9 GeV/c(2) (0 < p(t) < 2.0 GeV/c) for the 4% most central collisions. An exponential fit gives an inverse slope T-d = (450 +/- 30) MeV and a yield dN(d)/dy = 0. 34 +/- 0.03. The coalescence factor B-2 (m(t) = m(0))=(3.5 +/- 1.0) . 10(-4 ) GeV2 and its m(t)-dependence are deter-mined and discussed in terms of a model that includes the collective expansion of the source created in a col lision. The derived Gaussian size parameter R-G Of the emission volume is c onsistent with earlier HBT results on the source of pion emission. (C) 2000 Elsevier Science B.V. All rights reserved.