Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2005-10-20
Rom.Rep.Phys. 58 (2006) 055-062
Physics
Nuclear Physics
Nuclear Experiment
5 pages, 5 figures. Poster presented in Quark Matter 2005, 18th Internationl Conference on Nucleus-Nucleus Interactions, Augus
Scientific paper
The transverse energy distributions ($E_{T}$) have been measured for Au + Au collisions at $\sqrt{s_{NN}} = 62.4$ GeV by the STAR experiment at RHIC. They have been obtained from two measurements, the hadronic transverse energy ($E_{T}^{had}$) and the electromagnetic transverse energy($E_{T}^{em}$). $E_{T}^{had}$ has been measured from the tracks obtained by Time Projection Chamber (TPC) excluding the electrons and positrons. $E_{T}^{em}$ has been obtained by the STAR Barrel Electromagetic Calorimeter (BEMC) which measures the energy of electrons, positrons and photons. The measure of transverse energy gives an estimate of the energy density of the fireball produced in heavy ion collisions. $E_{T}$ per participant pair gives information about the production mechanism of particles.
Chattopadhaya Subhasis
de Moura Marcia Maria
Mahapatra Durga Prasad
Sahoo Raghunath
Suaide Alexandre A. P.
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