Search for Disoriented Chiral Condensates in 158 AGeV Pb+Pb Collisions

Abstract

The restoration of chiral symmetry and its subsequent breaking through a phase transition has been predicted to create regions of Disoriented Chiral Condensates (DCC). This phenomenon has been predicted to cause anomalous fluctuations in the relative production of charged and neutral pions in high-energy hadronic and nuclear collisions. The WA98 experiment has been used to measure charged and photon multiplicities in the central region of 158 AGeV Pb+Pb collisions at the CERN SPS. In a sample of 212646 events, no clear DCC signal can be distinguished. Using a simple DCC model, we have set a 90% C.L. upper limit on the maximum DCC production allowed by the data.

20 Pages, LaTeX, uses elsart.cls, 8 eps figures included, submitted to Physics Letters B

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Cited by in corpus (44)

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• Correlation femtoscopy of multiparticle processes
• Medium effects on the flow of strange particles in heavy ion collisions
• Techniques for multiboson interferometry
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• Systematics of Inclusive Photon Production in 158 AGeV Pb Induced Reactions on Ni, Nb, and Pb Targets
• Langevin Evolution of Disoriented Chiral Condensate
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• Dynamical simulation of DCC formation in Bjorken rods
• Event-by-event charged-neutral fluctuations in Pb+Pb collisions at 158 A~GeV
• Anomaly Induced Domain Formation of Disoriented Chiral Condensates
• Dynamical Pion Production via Parametric Resonance from Disoriented Chiral Condensate
• Azimuthal Anisotropy of Photon and Charged Particle Emission in Pb+Pb Collisions at 158 A GeV/c
• Search for DCC in Relativistic Heavy-Ion Collision Through Event Shape Analysis
• Localized Domains of Disoriented Chiral Condensates
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• Event-by-Event Search for Charged Neutral Fluctuations in Pb - Pb Collisions at 158-A-GeV
• Photon Production from Nonequilibrium Disoriented Chiral Condensates in a Spherical Expansion
• Modeling of Charged-Neutral Kaon Fluctuations as a Signature of DCC Production in A--A Collisions
• Effects of Disoriented Chiral Condensates on Two- and Three-Pion Correlations of Relativistic Nuclear Collisions
• Anomalous Pseudoscalar-Photon Vertex In and Out of Equilibrium
• Looking For Disoriented Chiral Condensates From Pion Distributions
• Overview of event-by-event analysis of high energy nuclear collisions
• Event-by-event study of DCC-like fluctuation in ultra-relativistic nuclear collisions
• Phi-measure and Disoriented chiral condensates
• A Fluctuation Probe of Disoriented Chiral Condensates
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• Relativistic heavy ion collisions --- Where are we now? Where do we go?
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