Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-07-15
Phys.Rev.C79:054913,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
One section removed, a few references added, the Regge trajectories of free QGP bags are considered
Scientific paper
10.1103/PhysRevC.79.054913
The influence of the medium dependent finite width of QGP bags on their equation of state is analyzed within an exactly solvable model. It is argued that the large width of the QGP bags not only explains the observed deficit in the number of hadronic resonances, but also clarifies the reason why the heavy QGP bags cannot be directly observed as metastable states in a hadronic phase. The model allows us to estimate the minimal value of the width of QGP bags from a variety of the lattice QCD data and get that the minimal resonance width at zero temperature is about 600 MeV, whereas the minimal resonance width at the Hagedorn temperature is about 2000 MeV. As shown these estimates are almost insensitive to the number of the elementary degrees of freedom. The recent lattice QCD data are analyzed and it is found that besides sigma T**4 term the lattice QCD pressure contains T-linear and T**4 ln T terms in the range of temperatures between 240 MeV and 420 MeV. The presence of the last term in the pressure bears almost no effect on the width estimates. Our analysis shows that at hight temperatures the average mass and width of the QGP bags behave in accordance with the upper bound of the Regge trajectory asymptotics (the linear asymptotics), whereas at low temperatures they obey the lower bound of the Regge trajectory asymptotics (the square root one). Since the model explicitly contains the Hagedorn mass spectrum, it allows us to remove an existing contradiction between the finite number of hadronic Regge families and the Hagedorn idea of the exponentially growing mass spectrum of hadronic bags.
Bugaev Kyrill A.
Petrov Vladimir K.
Zinovjev G. M.
No associations
LandOfFree
Quark Gluon Bags as Reggeons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quark Gluon Bags as Reggeons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quark Gluon Bags as Reggeons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-596285