TWO TEMPERATURES EMISSION OF RELATIVISTIC α-PARTICLES IN HIGH-ENERGY HEAVY-ION COLLISIONS

CAI Xu; ZHOU Zhuo-Wei

Chinese Physics C> 1987, Vol. 11> Issue(1) : 51-56

TWO TEMPERATURES EMISSION OF RELATIVISTIC α-PARTICLES IN HIGH-ENERGY HEAVY-ION COLLISIONS

CAI Xu ^, ,
ZHOU Zhuo-Wei

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Abstract：
We have performed an experimental study of the α-fragments emitted from collisions between emulsion nuclei and heavy-ion projectiles at beam energies beyond 1A GeV. It is shown that the transverse momentum distributions of relativistic α-particles give evidence for two effective temperatures emission in high-energy heavy-ion collisions. The data might take on a new signature for the phase transition from hadron matter to quark matter.

References

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Quark Matter '84, Proceedings of the Fourth International Conference on Ultra-Relativistic leas Collisions, Helsinki, Finland,17-2I June 1984, ed. by K. Kajantie, Lecture Notes in Physics 22-1. Springger-Verlag (1985).[2] R. Beckmann, S. Raha, N. Stelte and R. M. Weiner, Phys. Lett.105B(1981), 411.[3] L. D. Landau and E. M. Lifschitz, Fluid Mechanics, Peramon Press, London, 1975.[4] R.Weiner and M. Westrom, Nucl.Phys., A286(1977),282.S.Raha, R. M. Weiner and J. W.Wheeler, Phys. Rev.Lett., 53(1984), 138.[5] F.Halzen and H. C. Liu, Phys. Rev., D25(1982), 1842.[6] S. L. A. Garpman, Phys. Lett., 106B(1981), 367.[7] G.Domokos and J. I. Goldman, Phys, Rev., D23(1981), 203. Rafelski and B. Miiller, Phys. Rev. Lett., 48(1982), 1066. J. Cleymans, M. Dechantsreiter and F. Halzen, Z. Phys. C.,17(1983), 17.

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CAI Xu and ZHOU Zhuo-Wei. TWO TEMPERATURES EMISSION OF RELATIVISTIC α-PARTICLES IN HIGH-ENERGY HEAVY-ION COLLISIONS[J]. Chinese Physics C, 1987, 11(1): 51-56.

CAI Xu and ZHOU Zhuo-Wei. TWO TEMPERATURES EMISSION OF RELATIVISTIC α-PARTICLES IN HIGH-ENERGY HEAVY-ION COLLISIONS[J]. Chinese Physics C, 1987, 11(1): 51-56. 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

TWO TEMPERATURES EMISSION OF RELATIVISTIC α-PARTICLES IN HIGH-ENERGY HEAVY-ION COLLISIONS

CAI Xu ^,
ZHOU Zhuo-Wei

Corresponding author: CAI Xu,

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1987-02-05

Abstract: We have performed an experimental study of the α-fragments emitted from collisions between emulsion nuclei and heavy-ion projectiles at beam energies beyond 1A GeV. It is shown that the transverse momentum distributions of relativistic α-particles give evidence for two effective temperatures emission in high-energy heavy-ion collisions. The data might take on a new signature for the phase transition from hadron matter to quark matter.