Azimuthally anisotropic emission of pions in symmetric heavy-ion collisions

  • Triple differential cross sections d3 sigma /dp3 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 197Au+197Au 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.

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Author:D. Brill, W. Ahner, P. Baltes, R. Barth, Christian BormannGND, M. Cieslak, M. Debowski, E. Grosse, W. Henning, P. Koczon, B. Kohlmeyer, Dariusz Czesław MiśkowiecORCiD, Christian Müntz, Helmut OeschlerGND, H. Pöppl, Falk PühlhoferGND, S. Sartorius, Rainer SchickerORCiDGND, Peter Senger, Y. Shin, J. Speer, J. Stein, K. Stiebling, Reinhard StockGND, Herbert Ströbele, K. Völkel, A. WagnerORCiDGND, Wladek Walús
Parent Title (German):Physical review letters
Document Type:Article
Date of Publication (online):2005/10/05
Year of first Publication:1993
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/10/05
Page Number:4
First Page:336
Last Page:339
Source:Phys. Rev. Lett. 71, 336-339, ©1993 The American Physical Society,
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht