Search for Disoriented Chiral Condensates in 158 AGeV Pb+Pb(3)

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

1Introduction

TheapproximatechiralsymmetryoftheQCDvacuumisbelievedtobespon-taneouslybrokeninnaturebytheformationofanisoscalarquarkconden-sate.DisorientedChiralCondensates(DCC)mayforminlarge,hotregionsofhadronicmatterwherethissymmetryhasbeenbrie yrestored[1].ADCChasanequalprobabilitytobeinanystaterelatedtothenormalvacuumbyachiralrotation.Byprojectingthespaceoftheseavailablestatesontoaba-sisofde niteisospin,ithasbeenfoundthatthechargedistributionofpionsemittedfromaDCChasacharacteristicform[2]:

P(f)=1

f(1)

wherefistheneutralfraction,

f=Nπo