Heavy-ion experiments at CERN's Super Proton Synchrotron and at BNL's Relativistic Heavy Ion Collider have studied this phenomenon without a conclusive outcome as of 2009.
Heavy-ion експерименти at CERN's Super Proton Synchrotron и at BNL's Relativistic Heavy Ion Collider го проучувале овој феномен без убедлив резултат од 2009 година.