Scaling Behavior of (N_<ch&gr;)^<-1&gr;dN_<ch&gr;/dη at √<s_NN&gr; = 130 GeV by the PHOBOS Collaboration and Its Implication : A Possible Explanation Employing the Ornstein-Uhlenbeck Process
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概要
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Recently, interesting data concerning dN_<ch&gr;/dη in Au-Au collisions [η = - ln tan(θ/2)] with centrality cuts have been reported from the PHOBOS Collaboration. In most treatment these data are divided by the number of participants (nucleons) in collisions. Instead of this method, we use the total multiplicity N_<ch&gr; = ∫(dN_<ch&gr;/dη)dη and find that there is scaling phenomenon among (N_<ch&gr;)^<-1&gr;dN_<ch&gr;/dη = dn/dη with different centrality cuts at √<s_NN&gr; = 130 GeV. To explain this scaling behavior of dn/dη we employ a stochastic approach using the Ornstein-Uhlenbeck process with two sources. A Langevin equation is adopted for this explanation. Moreover, comparisons of dn/dη at √<s_NN&gr; = 130 GeV with that at √<s_NN&gr; = 200 GeV are made, and no significant difference is found. A possible method for the detection of the quark-gluon plasma (QGP) through dN_<ch&gr;/dη is presented.
- 2002-09-25
著者
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Ide Masaru
Department Of Physics Shinshu University
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Ide Masaru
Department Of Biochemistry Faculty Of Veterinary Medicine Hokkaido University
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Ide M
Department Of Physics Shinshu University
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BIYAJIMA Minoru
Department of Physics, Shinshu University
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MIZOGUCHI Takuya
Toba National College of Maritime Technology
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SUZUKI Naomichi
Matsumoto University
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Biyajima Minoru
Department Of Physics Shinshu University
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Suzuki N
Department Of Comprehensive Management Matsumoto Univ.
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Suzuki Naomichi
Mtsusho Gakuen Junior College
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Biyajima M
Department Of Physics Shinshu Univ.
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MIZOGUCHI Takuya
Department of Physics, Shinshu University
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MIZOGUCH Takuya
Toba National College of Maritime Technology
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Biyajima Minoru
Departmemt Of Physics Faculty Of Liberal Arts Shinshu University
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SUZUKI Naomichi
Department of Comprehensive Management, Matsumoto Univ.
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BIYAJIMA Minoru
Department of Physics, Shinshu Univ.
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BIYAJIMA Minoru
Department of Physics, Faculty of Liberal Arts Shinshu University
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BIYAJIMA Minoru
Department of Physics, Shinshu University : Niels Bohr Institute
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BIYAJIMA Minoru
Department of Physics, Faculty of Science, Shinshu University
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