Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2007-06-05
Physics
Nuclear Physics
Nuclear Experiment
8 pages, 8 figures, Proceedings of the 23rd Winter Workshop on Nuclear Dynamics, Big Sky, Montana, February 11--18, 2007
Scientific paper
Hadronic resonances with short life times and strong coupling to the dense medium may exhibit mass shifts and width broadening as signatures of chiral symmetry restoration at the phase transition between hadronic and partonic matter. Resonances with different lifetimes are also used to extract information about the time evolution and temperature of the expanding hadronic medium. In order to collect information about the early stage (at the phase transition) of a heavy-ion collision, resonances and decay particles which are unaffected by the hadronic medium have to be used. We explore a possible new technique to extract signals from the early stage through the selection of resonances from jets. A first attempt of this analysis, using the reconstructed $\phi$(1020) from 200 GeV Au+Au collisions in STAR, is presented.
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