Antibaryon production in sulphur nucleus collisions at 200 GeV per nucleon

Authors :: Alber, T Appelshauser, H Bachler, J Bartke, J and Bialkowska, H Bloomer, MA Bock, R Braithwaite, WJ and Brinkmann, D Brockmann, R Buncic, P Chan, P Cramer, JG and Cramer, PB Derado, I Eckardt, V Eschke, J Favuzzi, C and Ferenc, D Fleischmann, B Foka, P Freund, P Fuchs, M and Gazdzicki, M Gladysz, E Grebieszkow, J Gunther, J and Harris, JW Hoffmann, M Jacobs, P Kabana, S Kadija, K and Kowalski, M Kuhmichel, A Lee, JY Ljubicic, A Margetis, S and Mitchell, JT Morse, R Nappi, E Odyniec, G Paic, G and Panagiotou, AD Petridis, A Piper, A Posa, F and Poskanzer, AM Puhlhofer, F Rauch, W Renfordt, R Retyk, W and Rohrich, D Roland, G Rothard, H Runge, K Sandoval, A and Schmitz, N Schmoetten, E Sendelbach, R Seyboth, P and Seyerlein, J Skrzypczak, E Spinelli, P Stock, R and Strobele, H Trainor, TA Vasileiadis, G Vassiliou, M and Vranic, D Wenig, S Wosiek, B Zhu, X
Publication Year :: 1996
Abstract: Antiproton production near midrapidity has been studied in central collisions of S-32 With sulphur, silver and gold nuclei at 200 GeV per nucleon. The measured transverse mass distributions can be described by an exponential with inverse slope parameters of about 200 MeV, similar to those obtained from spectra. The rapidity density increases weakly with the target mass, ranging from 0.4 to 0.7. The ratio near midrapidity is approximately 1.4 on average, significantly larger than the corresponding ratio observed in proton-proton and proton-nucleus collisions.

Tools