Transverse energy measurement in Au+Au collisions by the STAR experiment |
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Authors: | R Sahoo |
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Institution: | (1) Physics Department, Yale University, New Haven, CT 06520, USA |
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Abstract: | Transverse energy (E
T
) has been measured with both of its components, namely hadronic (E
T
had
) and electromagnetic (E
T
em
) in a common phase space at mid-rapidity for 62.4 GeV Au+Au collisions by the STAR experiment. E
T
production with centrality and ?{sNN }\sqrt {s_{NN} } is studied with similar measurements from SPS to RHIC and is compared with a final state gluon saturation model (EKRT). The
most striking feature is the observation of a nearly constant value of E
T
/N
ch
∼ 0.8 GeV from AGS, SPS to RHIC. The initial energy density estimated by the boost-invariant Bjorken hydrodynamic model,
is well above the critical density for a deconfined matter of quarks and gluons predicted by lattice QCD calculations. |
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Keywords: | |
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