Jet acoplanarity as a quark-gluon-plasma probe

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Abstract
We reinvestigate the probability distribution of jet acoplanarity as a tool to search for quark-gluon-plasma formation in nuclear collisions. We find serious hadronic background effects from the surrounding nuclear matter in nuclear collisions, which severely limit the usefulness of jet acoplanarity as a quark-gluon-plasma probe. Only if quark-gluon-plasma creation can be ascertained or excluded independently may a high jet acoplanarity provide qualitative additional information.