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Chinese Physics C > 1993, Vol. 17 > Issue(8): 725-730

Anisotropy of the Pion Emission and the Nuclear Equation of State

  • Department of Physics,Harbin Institute of Technology,Harbin 1500061 Department of Physics,Kent State University,Kent,Ohio 442422 Department of Physics,University of Carlifornia,Riverside,Ca 92521

  • The anisotropy of the pion emission in the collisions of 1.8AGeV Ar+Pb is studied with the VUU model to obtain the information of the nuclear equation of state.We point out that the collective motion of pions in the final state has the final state has the characteristic similar to that of collective correlations of baryons,and the azimuthal anisotropy of pions is a sensitive parameter to the nuclear equation of state in the projectile rapidity region where the absorption of target spectator is weak.Collisions of 1.8AGeV Ar+Pb in the Bevalac streamer chamber are analyzed using the azimuthal correlation function for pions and the results favor the hard nuclear incompressibility.
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    [1] For review, see K. -H. Kampert, J. Phys.，G15(1989),691.[2]P. J. Siemens. J. O. Rasmussen, Phys. Rev.42(1979),880.[3]D. Keane et al.，in Proceedings of the Nuclear Dynamics Workshop IV, Copper Mountain, Colorado, 1986,p.151.[4]C. Hartnack, H. Stocker, W.Greiner, in Proceedings of the International Workshop on Gross Properties of Nuclei and Nuclear Excitation XVI, Hirschegg, Austria 1988, ed. H. Feldmeier P. 138.[5]J. Gosset et al.，Phys. Rev. Lett.，62(1989),1251.[6]J. P. Alard et al.，`Anisotropy of the pion emission in relativistic nucleus-nucleus collisions", Rapport DPh-N/Saclav n02583 B. DPHN 90-4(1990).[7]J. P. Alard et al.，"Studies of Nuclear Collective Flow with DIOGENE", Rapport DPh-N/Saclay n02587 B,DPHN 90-10(1990).[8]B. A. Li, W. Bauer, G. F.Bertsch, Phys.Rev..C44(1991),2095.[9]B. A. Li, W. Bauer, Phys. Rev. ,C44(1991),450.[10]K. G. R. Doss et al.，Phys.Rev. Lett.，57(1986),559.[11]D. Beavis et al.，Phys. Rev.，C45(1992),299.[12]D. Keane et al.，Phys. Rev.，C37(1988),1447.[13]H. Kruse B. V. Jack, H. Stocker, Phys. Rev. Lett.，54(1985),289.[14]J. J. Molitoris, Stocker, Phys. Rev.，C32(1985),346.[15]G. M. Welke et al.,Phys. Rev.C38(1988),2101.[16]J. Jiang et al.，Phys. Rev. Lett.，68(1992),2739.[17]D. Beavis et al.，Phys. Rev.，C34(1986),757.[18]S. Wang et al.，Phys. Rev.，C44(1991),1091.[19]C. Cavata, These de Doctorat, Universite de Paris XI (1989).[20]Y. M. Liu et al.，Phys. Rev.，C34(1986),1667.

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WANG Shan, LIU Yi-Ming and LOU Qing-Jun. Anisotropy of the Pion Emission and the Nuclear Equation of State[J]. Chinese Physics C, 1993, 17(8): 725-730.
WANG Shan, LIU Yi-Ming and LOU Qing-Jun. Anisotropy of the Pion Emission and the Nuclear Equation of State[J]. Chinese Physics C, 1993, 17(8): 725-730. shu
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Received: 1900-01-01
Revised: 1900-01-01
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    Anisotropy of the Pion Emission and the Nuclear Equation of State

      Corresponding author:WANG Shan,
    • Department of Physics,Harbin Institute of Technology,Harbin 1500061 Department of Physics,Kent State University,Kent,Ohio 442422 Department of Physics,University of Carlifornia,Riverside,Ca 92521
    • Received Date:1900-01-01
    • Accepted Date:1900-01-01
    • Available Online:1993-08-05

      Abstract:The anisotropy of the pion emission in the collisions of 1.8AGeV Ar+Pb is studied with the VUU model to obtain the information of the nuclear equation of state.We point out that the collective motion of pions in the final state has the final state has the characteristic similar to that of collective correlations of baryons,and the azimuthal anisotropy of pions is a sensitive parameter to the nuclear equation of state in the projectile rapidity region where the absorption of target spectator is weak.Collisions of 1.8AGeV Ar+Pb in the Bevalac streamer chamber are analyzed using the azimuthal correlation function for pions and the results favor the hard nuclear incompressibility.

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