Event Texture Search for Phase Transitions in Pb+Pb Collisions

Bearden, I.; Wolf, K.L.; Ljubicic, A., Jr.; Paic, G.; Polychronakos, V.; Hansen, O.; Hummel, P.; Sakaguchi, A.; Jayanti, R.; Kohama, T.; Sugitate, T.; Fields, D.E.; Pluta, J.; Murray, M.; Kaimi, K.; Boissevain, J.; Hansen, A.G.; Lorstad, B.; Leltchouk, M.; Piuz, F.; Reichhold, D.; Maeda, N.; Conin, L.; Sumi, Y.; Jacak, B.V.; Ferenc, D.; Poulard, G.; Simon-Gillo, J.; Potekhin, M.; Sullivan, J.P.; Pandey, S.U.; Franz, A.; Gaardhoje, J.J.; Martin, L.; Hardtke, D.; Boggild, H.; Ohnishi, H.; Fabjan, C.W.; Sondheim, W.; Zachary, D.S.; Kaneta, M.; Medvedev, A.; van Hecke, H.; Xu, N.; Dodd, J.; Schmidt-Sorensen, J.; Holzer, E.B.; Erazmus, B.; Kopytine, M.L.; Willis, W.J.; Humanic, T.J.; Esumi, S.

doi:10.1103/PhysRevC.65.044903

Article
Report number	nucl-ex/0107007
Title	Event Texture Search for Phase Transitions in Pb+Pb Collisions
Author(s)	Bearden, I. ; Boggild, H. ; Boissevain, J. ; Conin, L. ; Dodd, J. ; Erazmus, B. ; Esumi, S. ; Fabjan, C.W. ; Ferenc, D. ; Fields, D.E. ; Franz, A. ; Gaardhoje, J.J. ; Hansen, A.G. ; Hansen, O. ; Hardtke, D. ; van Hecke, H. ; Holzer, E.B. ; Humanic, T.J. ; Hummel, P. ; Jacak, B.V. ; Jayanti, R. ; Kaimi, K. ; Kaneta, M. ; Kohama, T. ; Kopytine, M.L. ; Leltchouk, M. ; Ljubicic, A., Jr. ; Lorstad, B. ; Maeda, N. ; Martin, L. ; Medvedev, A. ; Murray, M. ; Ohnishi, H. ; Paic, G. ; Pandey, S.U. ; Piuz, F. ; Pluta, J. ; Polychronakos, V. ; Potekhin, M. ; Poulard, G. ; Reichhold, D. ; Sakaguchi, A. ; Schmidt-Sorensen, J. ; Simon-Gillo, J. ; Sondheim, W. ; Sugitate, T. ; Sullivan, J.P. ; Sumi, Y. ; Willis, W.J. ; Wolf, K.L. ; Xu, N. ; Zachary, D.S. NA44 Collaboration Afficher les 52 auteurs
Affiliation	(Los Alamos Lab.) ; (Biels Boht Inst., Copenhagen) ; (Columbia Univ., New York) ; (Nucl. Phys. Lab. Nantes) ; (Hiroshima Univ.) ; (Rudjer Boscovic Inst., Zagreb) ; (Texas A&M Univ., College Station) ; (Ohio State Univ., Columbus) ; (SUNY, Stony Brook) ; (Univ. Lund) ; (Brookhaven National Lab.)
Publication	2002
Imprint	10 Jul 2001
Number of pages	12
In:	Phys. Rev. C 65 (2002) 044903
DOI	10.1103/PhysRevC.65.044903
Subject category	Nuclear Physics - Experiment
Abstract	NA44 uses a 512 channel Si pad array covering $1.5 <\eta < 3.3$ to study charged hadron production in 158 A GeV Pb+Pb collisions at the CERN SPS. We apply a multiresolution analysis, based on a Discrete Wavelet Transformation, to probe the texture of particle distributions event-by-event, allowing simultaneous localization of features in space and scale. Scanning a broad range of multiplicities, we search for signals of clustering and of critical behavior in the power spectra of local density fluctuations. The data are compared with detailed simulations of detector responce, using heavy ion event generators, and with a reference sample created via event mixing. An upper limit is set on the probability and magnitude of dynamical fluctuations.

Corresponding record in: Inspire
Email contact: kopytine@maryann.physics.sunysb.edu

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