Large momenta fluctuations of charm quarks in the Quark-Gluon Plasma

  • S. Terranova
  • D. M. Zhou
  • A. BonaseraEmail author
Original Article


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 behavior is completely consistent with the order parameter defined for a system of interacting quarks both at zero temperature (and finite baryon densities) or at finite temperatures which shows a jump in correspondence with a first-order phase transition to the QGP. The J/Ψ displays 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 search.


12.39.Pn Potential models 24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes 


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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  1. 1.Laboratorio Nazionale del SudIstituto Nazionale di Fisica NucleareCataniaItaly

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