Abstract
A phenomenological model describing the transverse energy distribution (ET) of nuclear collisions is first studied in detail by fitting it on ET data for O-Pb collisions at √sNN = 200 GeV per nucleon obtained from the NA35 collaboration. Next, the model is used to fit the ET data for Pb-Pb collisions at LHC energies of √sNN = 2.76 TeV per nucleon obtained from the ATLAS collaboration. From the fits, we determine an upper bound for the energy density for Pb-Pb collisions at LHC energies of √sNN = 2.76 TeV per nucleon.
Highlights
According to the Standard Model, hadronic particles are bound states of quarks
Going from hadronic particles to Quark Gluon Plasma at high temperatures is known as Deconfinement, whereas going from Quark Gluon Plasma to hadronic particles at low temperatures is known as Hadronisation
We show that the upper bound for the energy density for the collision data in figure 1 is 0.006
Summary
According to the Standard Model, hadronic particles are bound states of quarks. The quarks in the hadronic particles interact via the strong force and are bound by the strong force. The implication of Asymptotic freedom is this: at high enough temperatures, we might have a possible new state of matter, where the quarks exist not as bound states, but as free particles. This new state of matter has been termed "Quark Gluon Plasma". Such heavy ion collisions were first done in colliders like the RHIC (Relativistic Heavy Ion Collider), and are done today in experiments like ALICE (A Large Ion Collider Experiment) in CERN.
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