Estimate of the Maximal Energy Density and Space-Time Region of the Quark Matter in High Energy Heavy Ion Collisions

ZHUANG Peng-Fei; LIU Lian-Shou

Chinese Physics C> 1991, Vol. 15> Issue(6) : 535-542

Estimate of the Maximal Energy Density and Space-Time Region of the Quark Matter in High Energy Heavy Ion Collisions

ZHUANG Peng-Fei ^, ,
LIU Lian-Shou

Institute of Particle Physics,Hua-Zhong Normal University,Wuhan 430070

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Abstract：
The Bjorken formula about maximal energy density in heavy ion collisions is modified,the effective way to increase the energy density is also analysed.The hydrodynamic equations and the equations of state in central and fragmental regions are discussed.It is pointed out that because of the energy diffusion caused by expansion of the system,it is lifficult to produce quark matter in fragmental region.For Au-Au collisions on the RHIC to be buict at BNL,the space-time region where phase transition occur d and the corresponding extent of impact parameter are predicted.

References

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E. V.Shuryak, Phys. Rep., 61(1980), No. 2.[2] For example, Proceedings of the Fifth International conference on Ultra-Relativistic Nucleus-Nucleus.Collisions, Asilomar conference Center, Pacific Grove, California, April 13-17, 1986, Edited by L. S Schroeder and M. Gyulassy, Nucl. Phys., A461(1987), No. 1/2.[3] For example, Proceedings of the Sixth International conference on Ultra-Relativistic Nucleus-Nucleus,Collisions-Quark Matter 1987 Edited by H. Satz,H. J. Specht and R. Stock, Z. Physik, C38(1958),No. 1/2.[4] M. Jacob, Nucl. Phys., A498(1989), lc. J. W. Harris (NA35), Nucl. Phys., A498(1989), 133c.[5] WA80 Collaboration, Z. Physik., C38(1908), 3.[6] J. D. Biorken, Phys. Rev.,D27(1983), 140.[7] I. Otterlund, S. Garpman, I. Lund; Z. Physik., C20(1983), 281.[8] J. Cleymans, R. V. Gavai and E. Suhonen, Phys. Rep., 130(1986), No. 4.[9] T. Celik, J. Engels and H. Satz, Nucl. Phys., B256(1985), 670.[10] K. Kajantie, R. Ratio, P. V. Ruuskanen, Nucl. Phys., B222(1983), 152.

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ZHUANG Peng-Fei and LIU Lian-Shou. Estimate of the Maximal Energy Density and Space-Time Region of the Quark Matter in High Energy Heavy Ion Collisions[J]. Chinese Physics C, 1991, 15(6): 535-542.

ZHUANG Peng-Fei and LIU Lian-Shou. Estimate of the Maximal Energy Density and Space-Time Region of the Quark Matter in High Energy Heavy Ion Collisions[J]. Chinese Physics C, 1991, 15(6): 535-542. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Estimate of the Maximal Energy Density and Space-Time Region of the Quark Matter in High Energy Heavy Ion Collisions

ZHUANG Peng-Fei ^,
LIU Lian-Shou

Corresponding author: ZHUANG Peng-Fei,

Institute of Particle Physics,Hua-Zhong Normal University,Wuhan 430070

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1991-06-05

Abstract: The Bjorken formula about maximal energy density in heavy ion collisions is modified,the effective way to increase the energy density is also analysed.The hydrodynamic equations and the equations of state in central and fragmental regions are discussed.It is pointed out that because of the energy diffusion caused by expansion of the system,it is lifficult to produce quark matter in fragmental region.For Au-Au collisions on the RHIC to be buict at BNL,the space-time region where phase transition occur d and the corresponding extent of impact parameter are predicted.