Search for Critical Behaviors by RHIC-PHENIX

K.Homma

Chinese Physics C> 2007, Vol. 31> Issue(12) : 1145-1148

Search for Critical Behaviors by RHIC-PHENIX

K.Homma ^,

Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Japan

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Abstract：
Integrated two particle correlation functions have been extracted from charge particle multiplicity density fluctuations in pseudorapidity space by analyzing Au+Au collision events at s_NN=200GeV taken by RHIC-PHENIX. The correlation lengths as a function of the number of participants N_p indicate a non monotonic increase at around N_p=100 and the corresponding energy density based on the Bjorken picture is ε_Bjτ～2.5GeV.fm^－2. This could be a symptom of a critical behavior.

References

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. Adcox K et al. (PHENIX Collaboration). Nucl. Instrum.Methods, 2003, A499: 4692. Adler S S et al. (PHENIX Collaboration). Phys. Rev., 2005,C71: 034908; 2005, C71: 049901; arXiv:nucl-ex/04090153. Ginzburg V L, Landau L D. Zh. Eksp. Teor. Fiz., 1950, 20:10644. Ornstein L S, Zernike F. Proc. Sect. Sci. K. Med. Akad.Wet., 1914, 17: 7935. Scalapino D J, Sugar R L. Phys. Rev., 1973, D8: 22846. De Wolf E A, Dremin I M, Kittel W. Phys. Rept., 1996,270: 1. arXiv:hep-ph/95083257. Bialas A, Peschanski R. Nucl. Phys., 1986, B273: 703;Bialas A, Peschanski R. Nucl. Phys., 1988, B308: 8578. Zajc W A. Phys. Lett., 1986, B175: 2199. Adler S S et al. (PHENIX Collaboration). Phys. Rev. Lett.,2003, 91: 07230110. Alessandro B et al. (NA50 Collaboration). Eur. Phys. J.,2005, C39: 335. arXiv:hep-ex/0412036

[1] GUO Yun-Jun , HE Kang-Lin . Muon Identification Using the Efficiencies Ratio Method at BESⅡ. Chinese Physics C, 2007, 31(11): 1050-1055.
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K.Homma. Search for Critical Behaviors by RHIC-PHENIX[J]. Chinese Physics C, 2007, 31(12): 1145-1148.

K.Homma. Search for Critical Behaviors by RHIC-PHENIX[J]. Chinese Physics C, 2007, 31(12): 1145-1148. shu

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Received: 2007-07-17
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

Search for Critical Behaviors by RHIC-PHENIX

K.Homma ^,

Corresponding author: K.Homma,

Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Japan

Received Date: 2007-07-17
Accepted Date: 1900-01-01
Available Online: 2007-12-05

Abstract: Integrated two particle correlation functions have been extracted from charge particle multiplicity density fluctuations in pseudorapidity space by analyzing Au+Au collision events at s_NN=200GeV taken by RHIC-PHENIX. The correlation lengths as a function of the number of participants N_p indicate a non monotonic increase at around N_p=100 and the corresponding energy density based on the Bjorken picture is ε_Bjτ～2.5GeV.fm^－2. This could be a symptom of a critical behavior.