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

Related Subjects

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