arXiv subjects

S. Terranova

Publications and source records attributed to S. Terranova.

5 recordsLinked to original sources

arXiv2007

Kinetic description of hadron-hadron collisions

A transport model based on the mean free path approach to describe pp collisions is proposed. We assume that hadrons can be treated as bags of partons similarly to the MIT bag model. When the energy density in the collision is higher than a critical value, the bags break and partons are liberated. The partons expand and can make coalescence to form new hadrons. The results obtained compare very well with available data and some prediction for higher energies collisions are discussed. Based on the model we suggest that a QGP could already be formed in the pp collisions at high energies.

hep-ph↗

arXiv2006

Kinetic Description of a Finite Temperature Meson Gas

A transport model based on the mean free path approach for an interacting meson system at finite temperatures is discussed. A transition to a quark gluon plasma is included within the framework of the bag model. We discuss some calculations for a pure meson gas where the Hagedorn limiting temperature is reproduced when including the experimentally observed resonances. Next we include the possibility for a QGP formation based on the MIT bag model. The results obtained compare very well with Lattice QCD calculations. In particular the cross over to the QGP at about 175 MeV temperature is nicely reproduced.

nucl-th↗

arXiv2005

A Novel Dynamical Approach To Relativistic Heavy Ion Collisions

A transport model for ultra-relativistic nucleus-nucleus collisions based on the mean free path approach is proposed. The method is manifestly Lorentz invariant. We discuss some calculations for pp and AA collisions and compare to a previously proposed transport model and to data. We demonstrate that our approach gives a different impact parameter distribution already in pp collisions as compared to the previous one. The role of hadronization times is discussed. Comparison to data is reasonable and the model can be easily modified to take into account genuine many body effects and quantum statistics similarly to low energy heavy ion collisions.

nucl-th↗

arXiv2004

Large Momenta Fluctuations Of Charm Quarks In The Quark-Gluon Plasma

We show that large fluctuations of D mesons kinetic energy (or momentum) distributions might be a signature of a phase transition to the quark gluon plasma (QGP). In particular, a jump in the variance of the momenta or kinetic energy, as a function of a control parameter (temperature or Fermi energy at finite baryon densities) might be a signature for a first order phase transition to the QGP. This behaviour is completely consistent with the order parameter defined for a system of interacting quarks at zero temperature and finite baryon densities which shows a jump in correspondance to a first order phase transition to the QGP. The $J/Ψ$ shows exactly the same behavior of the order parameter and of the variance of the D mesons. We discuss implications for relativistic heavy ion collisions within the framework of a transport model and possible hints for experimental data.

nucl-th↗

arXiv2004

Constrained Molecular Dynamics simulation of the Quark-Gluon Plasma

We calculate the Equation of State of a quark system interacting through a phenomenological potential: the Richardson's potential, at finite baryon density and zero temperature. In particular we study three different cases with different quark masses($u$ and $d$), and different assumptions for the potential at large distances. We solve molecular dynamics with a constraint due to Pauli blocking and find evidencies of a phase transition from "nuclear" to "quark matter", which is analyzed also through the behaviour of the $J/Ψ$ embedded in the quark system. We show that the $J/Ψ$ particle behaves as an order parameter.

hep-ph↗