Restoration of a Lost Symmetry -- Mass Reduction of the η' Mesons in 10^-22 Sec
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masslostreductionrestorationsymmetryapparentlycalledcollisions
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A particle called \eta' meson is found to reduce its mass in less than 10^-22 second in high energy heavy ion collisions at RHIC. Apparently this is the fastest mass reduction ever observed. This indicates the restoration of a lost symmetry of strong interactions in a hot and dense, hadronic matter.
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