Search for Disoriented Chiral Condensates in 158 AGeV Pb+Pb(20)

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 produ

DCCs / Central Event

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ζ(%)Fig.6.90%C.LupperlimitonDCCproductionpercentraleventasafunctionofthefractionofDCCpionsundertwoassumptions.ThethicklinegivestheupperlimitobtainedbyassumingtheσDZinSZiscompletelygivenbytheVENUScalculationrequiringtomakeacutat6σ.ThedashedlineshowsalessconservativelimitobtainedbyusingtheσDZmeasuredinthedataitself.Thisallowsustomake

atightercutat5σ,increasingtheDCCdetectione ciency.