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

S. Terranova·D. M. Zhou·A. Bonasera
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Abstract

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.

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S. Terranova, D. M. Zhou, A. Bonasera. 2004-12-09. Large Momenta Fluctuations Of Charm Quarks In The Quark-Gluon Plasma. https://doi.org/10.1140/epja%2Fi2005-10183-2

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