Azimuthally anisotropic emission of pions in symmetric heavy-ion collisions

Journal Article · Mon Jul 19 00:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.336· OSTI ID:6173112

Brill, D; Ahner, W; Baltes, P; Barth, R; Bormann, C; Cieslak, M; Debowski, M; Grosse, E; Henning, W; Koczon, P; Kohlmeyer, B; Miskowiec, D; Muentz, C; Oeschler, H; Poeppl, H; Puehlhofer, F; Sartorius, S; Schicker, R; Senger, P; Shin, Y ; Speer, J; Stein, J; Stiebing, K; Stock, R; Stroebele, H; Voelkel, K; Wagner, A; Walus, W ^[1]

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1. Johann Wolfgang Goethe-Universitaet, D-6000 Frankfurt/Main (Germany) Gesellschaft fuer Schwerionenforschung, D-6100 Darmstadt (Germany) Technische Hochschule Darmstadt, D-6100 Darmstadt (Germany) Philipps-Universitaet, D-3550 Marburg (Germany) Jagiellonian University, PL-30-059 Krakow (Poland)

Triple differential cross sections [ital d][sup 3][sigma]/[ital dp][sup 3] for charged pions produced in symmetric heavy-ion collisions were measured with the KaoS magnetic spectrometer at the heavy-ion synchrotron facility SIS at GSI. The correlations between the momentum vectors of charged pions and the reaction plane in [sup 197]Au+[sup 197]Au collisions at an incident energy of 1 GeV/nucleon were determined. We observe, for the first time, an azimuthally anisotropic distribution of pions, with enhanced emission perpendicular to the reaction plane. The anisotropy is most pronounced for pions of high transverse momentum in semicentral collisions.

• OSTI ID: 6173112
• Journal Information: Physical Review Letters; (United States), Vol. 71:3; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EMISSION
ANISOTROPY
GOLD 197 TARGET
GOLD 197 REACTIONS
SYMMETRY
PIONS
CORRELATIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
GEV RANGE 01-10
HEAVY ION REACTIONS
IMPACT PARAMETER
MAGNETIC SPECTROMETERS
SIS SYNCHROTRON
TRANSVERSE MOMENTUM
ACCELERATORS
BOSONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
HADRONS
HEAVY ION ACCELERATORS
LINEAR MOMENTUM
MEASURING INSTRUMENTS
MESONS
NUCLEAR REACTIONS
PSEUDOSCALAR MESONS
SPECTROMETERS
SYNCHROTRONS
TARGETS
663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-)