Baryon Stopping and Charged Particle Distributions in Central Pb+Pb Collisions at 158 GeV per Nucleon

Journal Article · Mon Mar 01 04:00:00 EST 1999 · Physical Review Letters

OSTI ID:328593

Panagiotou, A D; Petridis, A; Vassiliou, M ^[1]; Cooper, G E; Huang, I; Irmscher, D; Jacobs, P; Margetis, S; Odyniec, G; Porter, R J; Poskanzer, A M; Ritter, H G; Rudolph, H; Toy, M; Wang, F; Wienold, T; Xu, N ^[2]; Barnby, L S; Barton, R A; Blyth, C O ; Caines, H L; Hill, L A; Jones, P G; Nelson, J M; Squier, G T; Yates, T A; Zybert, R ^[3]; Csato, P; Fodor, Z; Gal, J; Hegyi, S; Levai, P; Molnar, J; Palla, G; Sikler, F; Szentpetery, I; Sziklai, J; Vesztergombi, G; Zimanyi, J ^[4]; Baechler, J; Brun, R; Buncic, P; Ferguson, M I; Fischer, H G; Vranic, D; Wenig, S ^[5]; Bartke, J; Gladysz, E; Kowalski, M; Rybicki, A ^[6]; Appelshaeuser, H; Bock, R; Brockmann, R; Irmscher, D; Markert, C; Roland, C; Sandoval, A; Sann, H ^[7]; Brady, F P; Cebra, D; Dunn, J; Huang, I; Wood, L ^[8]; Kolesnikov, V I; Malakhov, A I; Melkumov, G L; Semenov, A Y ^[9]; Billmeier, A; Bormann, C; Buncic, P; Flierl, D; Foka, P; Fuchs, M; Gabler, F; Gazdzicki, M; Guenther, J; Huemmler, H; Oldenburg, M; Poziombka, S; Renfordt, R; Roehrich, D; Roland, G; Rudolph, H; Schmischke, D; Stock, R; Stroebele, H ^[10]; Igo, G; Lasiuk, B; Toy, M; Trentalange, S; Whitten, C ^[11]; Eckhardt, F; Friese, V; Henkel, T; Piper, A; Puehlhofer, F; others, and

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1. Department of Physics, University of Athens, Athens (Greece)
2. Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)
3. Birmingham University, Birmingham (United Kingdom)
4. KFKI Research Institute for Particle and Nuclear Physics, Budapest (Hungary)
5. CERN, Geneva (Switzerland)
6. Institute of Nuclear Physics, Cracow (Poland)
7. Gesellschaft fuer Schwerionenforschung (GSI), Darmstadt (Germany)
8. University of California at Davis, Davis, California 95616 (United States)
9. Joint Institute for Nuclear Research, Dubna (Russia)
10. Fachbereich Physik der Universitaet, Frankfurt (Germany)
11. University of California at Los Angeles, Los Angeles, California 90095 (United States)

Net proton and negative hadron spectra for central Pb+Pb collisions at 158thinspthinspGeV per nucleon at the CERN Super Proton Synchrotron were measured and compared to spectra from lighter systems. Net baryon distributions were derived from those of net protons. Stopping (rapidity shift with respect to the beam) and mean transverse momentum {l_angle}p{sub T}{r_angle} of net baryons increase with system size. The rapidity density of negative hadrons scales with the number of participant nucleons for nuclear collisions, whereas their {l_angle}p{sub T}{r_angle} is independent of system size. The {l_angle}p{sub T}{r_angle} dependence upon particle mass and system size is consistent with larger transverse flow velocity at midrapidity for Pb+Pb compared to S+S central collisions. {copyright} {ital 1999} {ital The American Physical Society}

• Research Organization: Yale University
• DOE Contract Number: FG02-91ER40609
• OSTI ID: 328593
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 82; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYONS
CHARGED PARTICLES
HADRONS
HEAVY ION REACTIONS
ISOSPIN
LEAD
PROTONS
REST MASS
STOPPING POWER
TRANSVERSE MOMENTUM