# Estimation of the Maximum Energy Density in High Energy Heavy Ion Collisions and the Space-time Region for the Formation of Quark Matter

• The Bjorken formula about maximum energy density in heavy ion collisions is improved. An effective way to increase the energy density is analyzed. Hydrodynamical equations and the equations of state in the central and fragmental regions are discussed. It is pointed out that because of the energy diffusion caused by the expansion of the system, it is difficult to produce quark matter in the fragmentation region. For the Au-Au collisions at RHIC to be built in BNL, the space-time region for the formation of quark matter and the corresponding range of the impact parameter are predicted.

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Zhuang Pengfei and Liu Lianshou. Estimation of the Maximum Energy Density in High Energy Heavy Ion Collisions and the Space-time Region for the Formation of Quark Matter[J]. Chinese Physics C, 1991, 15(S3): 297-305.
Zhuang Pengfei and Liu Lianshou. Estimation of the Maximum Energy Density in High Energy Heavy Ion Collisions and the Space-time Region for the Formation of Quark Matter[J]. Chinese Physics C, 1991, 15(S3): 297-305.
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Supported by the National Natural Science Foundation of China.

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## Estimation of the Maximum Energy Density in High Energy Heavy Ion Collisions and the Space-time Region for the Formation of Quark Matter

• CCAST(World Laboratory), Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China
Fund Project:  Supported by the National Natural Science Foundation of China.

Abstract: The Bjorken formula about maximum energy density in heavy ion collisions is improved. An effective way to increase the energy density is analyzed. Hydrodynamical equations and the equations of state in the central and fragmental regions are discussed. It is pointed out that because of the energy diffusion caused by the expansion of the system, it is difficult to produce quark matter in the fragmentation region. For the Au-Au collisions at RHIC to be built in BNL, the space-time region for the formation of quark matter and the corresponding range of the impact parameter are predicted.

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