Study of the heavy ion collisions dynamics through an hybrid approach: IP Glasma + Kinetic theory at fixed η/s
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Ultra-relativistic heavy-ion collisions at RHIC and LHC produce a strongly interacting quark–gluon plasma (QGP), a deconfined state of matter characterized by an exceptionally low shear viscosity to entropy density ratio, η/s. The study of the dynamical evolution of this medium provides important insights into the properties of strongly interacting matter under extreme conditions.
A relativistic transport approach at fixed η/s to the description of heavy ion collisions is presented. The evolution of the system is modeled through the relativistic Boltzmann equation, including the event-by-event fluctuations of the initial geometry. Particular attention is devoted to the early stages of the collision, where the dynamics is described by the Glasma, a state of color fields governed by Yang–Mills theory.
The developed framework is employed to investigate physical observables, such as spectra and flow coefficients and to study the role of transport coefficients in the medium evolution. The results are finally compared with experimental measurements.