Event-by-event fluctuations of the mean transverse momentum in 40, 80, and 158 A GeV/c Pb-Au collisions: CERES collaboration

Measurements of event-by-event fluctuations of the mean transverse momentum in Pb-Au collisions at 40, 80, and 158 A GeV/c are presented. A significant excess of mean p_T fluctuations at mid-rapidity is observed over the expectation from statistically independent particle emission. The results are s...

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Main Authors: Adamová, Dagmar (Author) , Appelshäuser, Harald (Author) , Braun-Munzinger, Peter (Author) , Damjanović, Sanja (Author) , Dietel, Thomas (Author) , Dietrich, Lars (Author) , Glässel, Peter (Author) , Dubitzky, Wilrid (Author) , Milošević, Jovan (Author) , Richter, Michael (Author) , Specht, Hans Joachim (Author) , Stachel, Johanna (Author) , Tilsner, Heinz (Author) , Wessels, Johannes P. (Author) , Wienold, Thomas (Author) , Windelband, Bernd (Author)
Format: Article (Journal) Chapter/Article
Language:English
Published: 2003
In: Arxiv

Online Access:Verlag, kostenfrei, Volltext: http://arxiv.org/abs/nucl-ex/0305002
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Author Notes:D. Adamová, G. Agakichiev, H. Appelshäuser, V. Belaga, P. Braun-Munzinger, R. Campagnolo, A. Castillo, A. Cherlin, S. Damjanović, T. Dietel, L. Dietrich, A. Drees, S. Esumi, K. Filimonov, K. Fomenko, Z. Fraenkel, C. Garabatos, P. Glässel, G. Hering, J. Holeczek, V. Kushpil, B. Lenkeit, W. Ludolphs, A. Maas, A. Marı́n, J. Milošević, A. Milov, D. Miśkowiec, L. Musa, Yu. Panebrattsev, O. Petchenova, V. Petráček, A. Pfeiffer, J. Rak, I. Ravinovich, P. Rehak, M. Richter, H. Sako, W. Schmitz, J. Schukraft, S. Sedykh, W. Seipp, A. Sharma, S. Shimansky, J. Slı́vová, H.J. Specht, J. Stachel, M. Šumbera, H. Tilsner, I. Tserruya, J.P. Wessels, T. Wienold, B. Windelband, J.P. Wurm, W. Xie, S. Yurevich, V. Yurevich

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520 |a Measurements of event-by-event fluctuations of the mean transverse momentum in Pb-Au collisions at 40, 80, and 158 A GeV/c are presented. A significant excess of mean p_T fluctuations at mid-rapidity is observed over the expectation from statistically independent particle emission. The results are somewhat smaller than recent measurements at RHIC. A possible non-monotonic behaviour of the mean p_T fluctuations as function of collision energy, which may have indicated that the system has passed the critical point of the QCD phase diagram in the range of mu_B under investigation, has not been observed. The centrality dependence of mean p_T fluctuations in Pb-Au is consistent with an extrapolation from pp collisions assuming that the non-statistical fluctuations scale with multiplicity. The results are compared to calculations by the RQMD and UrQMD event generators. 
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