Physical Implication of the Preliminary Single Photon Spectrum

Ai Xiaobai

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 1997, Vol. 21> Issue(10) : 926-931

Physical Implication of the Preliminary Single Photon Spectrum

Ai Xiaobai ^,

Institute of Nuclear research, the Chinese Academy of sciences, Shanghai 201800

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Abstract：
Based upon the relativistic bydrodynatnics, it is pointed out that although the recent data on the first single-photon spectrum show a linearity, it does not mean that in an ultra-relativistic auclei-auclei collision the system reaches equilibrium at some temperature in whole, making use of a new dynamical mechanism for hadronztion. phase transition, the evaluating results predict that if the phase transition from QGP to badronic matter is of first-order, for higher colliding energies (e.g.>200GeV/u) the photon spectra would show some concave curvature, which may be a possible signature for diagaosiog QGP.

References

[1]

K. Kampert, Electromagnetic Probes of Hot and Dense iNucl/iear Matter, IKP-MS-94/0101, Miinster, 1994.[2]R. Santo iet al/i., iNucl/i. iPhys/i., A566(1994)61c.[3]T. Awes, iNucl/i. iPhys/i., A590(1994)81c.[4]R. Albrecht iet al/i., Limits on the Production of Direct Photons in 200A GeV S + Au Collision,CERN-PPE / 95-186, 13 Dec., 1995.[5]E. Shuryak, L. Xiong, iPhys/i. iLett/i., B333(1994)316.[6]D. Srivastava, B. Sinha, iPhys/i. iRev/i. iLett/i., 73(1994)2421.[7]A. Dumitru iet al/i., Phy. iRev/i., C51(1995)2166.[8]N. Arbex iet al/i., iPhys/i. iLett/i., B345(1995)307.[9]J. Neumann, D. Seibert, G. Fai, iPhys/i. iRev/i., C51(1995)1460.[10]B. Miiller, iNucl/i. iPhys/i., A590(1995)3c.[11]J. Bjorken, iPhys/i. iRev/i., D27(1983)140.[12]L. McLerran, T. Toimela, iPhys/i. iRev/i., D31(1985)545.[13]S. Chakrabarty iet al/i., iPhys/i. iRev/i., D46(1992)3802.[14]M. Neubert, Z. iPhys/i., C42(1989)231.[15]J. Kapusta iet al/i., iPhys/i. iRev/i., D44(1991)2774.[16]L. Xiong, E. Shuryak, G. Brown, iPhys/i. iRev/i., D46(1992)3798.[17]S. Chin, iPhys/i. iLett/i., B119(1982)51.[18]J. Blaizot, J. Ollitrault, iPhys/i. iRev/i., D36(1987)916.[19]J. Kapusta, A. Mekjian, iPhys/i. iRev/i., D33(1986)1304.[20]Hsiao-bai Ai, Baosen Zhou, The Shape of Detected Actual Total High-Energy Photon Spectrum as a Possible Signature of the QuarkGluon Plasma, Proceedings of Sewnd International Symposium on Medium Energy iPhys/iics, Beijing, August 22-26, (1994)398.

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Ai Xiaobai. Physical Implication of the Preliminary Single Photon Spectrum[J]. Chinese Physics C, 1997, 21(10): 926-931.

Ai Xiaobai. Physical Implication of the Preliminary Single Photon Spectrum[J]. Chinese Physics C, 1997, 21(10): 926-931. 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

Physical Implication of the Preliminary Single Photon Spectrum

Ai Xiaobai ^,

Corresponding author: Ai Xiaobai,

Institute of Nuclear research, the Chinese Academy of sciences, Shanghai 201800

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1997-10-05

Abstract: Based upon the relativistic bydrodynatnics, it is pointed out that although the recent data on the first single-photon spectrum show a linearity, it does not mean that in an ultra-relativistic auclei-auclei collision the system reaches equilibrium at some temperature in whole, making use of a new dynamical mechanism for hadronztion. phase transition, the evaluating results predict that if the phase transition from QGP to badronic matter is of first-order, for higher colliding energies (e.g.>200GeV/u) the photon spectra would show some concave curvature, which may be a possible signature for diagaosiog QGP.