Charged Particle Production in Proton-, Deuteron-, Oxygen- and Sulphur-Nucleus Collisions at 200 GeV per Nucleon

The transverse momentum and rapidity distributions of net protons and negatively charged hadrons have been measured for minimum bias proton-nucleus and deuteron-gold interactions, as well as central oxygen-gold and sulphur-nucleus collisions at 200 GeV per nucleon. The rapidity density of net protons at midrapidity in central nucleus-nucleus collisions increases both with target mass for sulphur projectiles and with the projectile mass for a gold target. The shape of the rapidity distributions of net protons forward of midrapidity for d+Au and central S+Au collisions is similar. The average rapidity loss is larger than 2 units of rapidity for reactions with the gold target. The transverse momentum spectra of net protons for all reactions can be described by a thermal distribution with `temperatures' between 145 +- 11 MeV (p+S interactions) and 244 +- 43 MeV (central S+Au collisions). The multiplicity of negatively charged hadrons increases with the mass of the colliding system. The shape of the transverse momentum spectra of negatively charged hadrons changes from minimum bias p+p and p+S interactions to p+Au and central nucleus-nucleus collisions. The mean transverse momentum is almost constant in the vicinity of midrapidity and shows little variation with the target and projectile masses. The average number of produced negatively charged hadrons per participant baryon increases slightly from p+p, p+A to central S+S,Ag collisions.Comment: 47 pages, submitted to Z. Phys.

Charged particle spectra in central S+S collisions at 200 GeV/c per nucleon

The transverse momentum and rapidity distributions of negative hadrons and participant protons have been measured for central 32S+ 32S collisions at plab=200 GeV/c per nucleon. The proton mean rapidity shift ~1.6 and mean transverse momentum ~0.6 GeV/c are much higher than in pp or peripheral AA collisions and indicate an increase in the nuclear stopping power. All pT spectra exhibit similar source temperatures. Including previous results for K0s Lambda , and Lambda -bar, we account for all important contributions to particle production.Authors: Bächler, J.; Bartke, J.; Bialkowska, H.; Bock, R.; Brockmann, R.; Buncic, P.; Chase, S. I.; Derado, I.; Eckardt, V.; Eschke, J.; Ferenc, D.; Fleischmann, B.; Foka, P.; Fuchs, M.; Gazdzicki, M.; Gladysz, E.; Harris, J. W.; Heck, W.; Hoffmann, M.; Jacobs, P. M.; Kabana, S.; Kadija, K.; Keidel, R.; Kosiec, J.; Kowalski, M.; Kühmichel, A.; Lahanas, M.; Lee, J. Y.; Ljubicic, A.; Margetis, S.; Morse, R.; Nappi, E.; Odyniec, G.; Paic, G.; Panagiotu, A. D.; Petridis, A.; Piper, A.; Posa, F.; Poskanzer, A. M.; Pugh, H. G.; Pühlhofer, F.; Rai, G.; Rauch, W.; Renfordt, R.; Röhrich, D.; Roland, G.; Rothard, H.; Runge, K.; Sandoval, A.; Schambach, J. J.; Schmitz, N.; Schmoetten, E.; Schneider, I.; Seyboth, P.; Seyerlein, J.; Skrzypczak, E.; Stefanski, P.; Stock, R.; Ströbele, H.; Teitelbaum, L.; Tincknell, M. L.; Tonse, S.; Vasileiadis, G.; Vesztergombi, G.; Vranic, D.; Wenig, S

Transverse momentum dependence of Bose-Einstein correlations in 200-A/GeV/c S + A collisions

The NA35 experiment has collected a high statistics set of momentum analyzed negative hadrons near and forward of midrapidity for central collisions of 200A GeV/c 32S+S, Cu, Ag, and Au. Using momentum space correlations to study the size of the source of particle production, the transverse source radii are found to decrease by ~40% at midrapidity and ~20% at forward rapidity while the longitudinal radius RL is found to decrease by ~50% as pT increases over the interval 50<pT<600 MeV/c. Calculations using a microscopic phase space approach (relativistic quantum molecular dynamics) reproduce the observed trends of the data. PACS: 25.75.+rAutoren: Th. Alber9, J. Bächler6, J. Bartke4, H. Bialkowska11, M. A. Bloomer3, R. Bock5, W. J. Braithwaite12, D. Brinkmann6, R. Brockmann5, P. Buncic5, P. Chan12, P. B. Cramer12, J. G. Cramer12, I. Derado9, V. Eckardt9, J. Eschke6, C. Favuzzi2, D. Ferenc6,13, B. Fleischmann5, P. Foka5, P. Freund9, M. Fuchs6, M. Gazdzicki6, E. Gladysz4, J. W. Harris3, M. Hoffman7, P. Jacobs3, S. Kabana6, K. Kadija9,13, J. Kosiec10, M. Kowalski4, A. Kühmichel6, M. Lahanas6, J. Y. Lee6, A. Ljubicic, Jr.13, S. Margetis3, J. T. Mitchell3, R. J. Morse3, E. Nappi2, G. Odyniec3, G. Paic13, A. D. Panagiotou1, A. Petridis1,9, A. Piper8, F. Posa2, A. M. Poskanzer3, F. Pühlhofer8, W. Rauch9, R. Renfordt6, W. Retyk10, D. Röhrich6, G. Roland6, H. Rothard6, K. Runge7, A. Sandoval5, J. Schambach3, N. Schmitz9, E. Schmoetten7, I. Schneider6, P. Seyboth9, J. Seyerlein9, E. Skrzypczak11, P. Spinelli2, P. Stefansky4, R. Stock6, H. Ströbele6, T. A. Trainor12, G. Vasileiadis1, M. Vassiliou1,9, D. Vranic13, S. Wenig6, and B. Wosiek4

Der RICH Detektor von NA35

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Netzinstallation von Solaris 2.3 ueber Subnetzgrenzen hinweg

Available from TIB Hannover: RO 3476(164) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman