Azimuthal asymmetry of neutral pion emission in Au+Au reactions at 1 GeV/nucleon

Journal Article · Mon Aug 09 00:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.835· OSTI ID:6275833

Venema, L B; Braak, H; Loehner, H; Raschke, A E; Siemssen, R H; Sumbera, M; Wilschut, H W; Berg, F; Kuehn, W; Metag, V; Notheisen, M; Novotny, R; Pfeiffer, M; Ritman, J; Schwalb, O; Gobbi, A; Hildenbrand, K D; Hlavac, S; Holzmann, R; Simon, R S ; Sodan, U; Teh, K; Wessels, J P; Herrmann, N; Wienold, T; Kotte, R; Moesner, J; Neubert, W; Wohlfarth, D; Ostendorf, R; Schutz, Y; Brummund, N; Santo, R ^[1]

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1. Kernfysisch Versneller Instituut, Groningen (Netherlands) II. Physikalisches Institut, Universitaet Giessen, Giessen (Germany) Gesellschaft fuer Schwerionenforschung, Darmstadt (Germany) II. Physikalisches Institut, Universitaet Heidelberg, Heidelberg (Germany) Forschungszentrum Rossendorf, Dresden (Germany) GANIL, Caen (France) Institut fuer Kernphysik, Universitaet Muenster, Muenster (Germany)

The azimuthal angle distributions of neutral pions at midrapidity from Au+Au reactions at 1 GeV/nucleon incident energy have been measured. An enhanced emission of [pi][sup 0]'s perpendicular to the reaction plane is observed. The azimuthal asymmetry is dependent on the [pi][sup 0] momentum: the [pi][sup 0] spectrum perpendicular to the reaction plane is harder than in the reaction plane. The strength of the observed asymmetry appears to be more pronounced for [pi][sup 0] than for charged particles and neutrons.

• OSTI ID: 6275833
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:6; 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
ANGULAR DISTRIBUTION
ASYMMETRY
BARYONS
BOSONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
GEV RANGE 01-10
GOLD 197 REACTIONS
GOLD 197 TARGET
HADRONS
HEAVY ION REACTIONS
MESONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
TARGETS