Regular Article - Theoretical Physics
Glueballs, gluon condensate, and pure glue QCD below T c
Service de Physique Nucléaire et Subnucléaire, Université de Mons—UMONS, Place du Parc 20, 7000, Mons, Belgium
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Revised: 27 April 2010
Published online: 27 May 2010
A quasiparticle description of pure glue QCD thermodynamics at T≲T c is proposed and compared to recent lattice data. Given that a gas of glueballs with constant mass cannot quantitatively reproduce the early stages of the deconfinement phase transition, the problem is to identify a relevant mechanism leading to the observed sudden increase of the pressure, trace anomaly, etc. near the critical temperature. It is shown that the strong decrease of the gluon condensate at T≲T c combined with the increasing thermal width of the lightest glueballs might be the trigger of the phase transition.
© Springer-Verlag / Società Italiana di Fisica, 2010