Applications of thermo field dynamics to quark-gluon plasma in equilibrium and non equilibriul and non equilibrium phase state
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Date
2012-01
Authors
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Publisher
Universite Mouloud Mammeri
Abstract
The thermofield dynamics, a real-time formalism for finite temperature
quantum field theory (TFD), is used to calculate the rates for e+e reactions
at finite temperature and for the pion production. The results indicate
that temperature plays an important role in defining the possible hadronic
state after the plasma has cooled down. It is also utilised to define the
fragmentation function at high energy experiments. The definition of the
fragmentation is extended to finite temperature. The results at T = 0 and
T 6= 0 are compared. In general, we find that the fragmentation function
decreases in magnitude. At the end, this formulation of Quantum field
theory (TFD) as well as LvN approach are extended to define two-point
correlators at finite t and T, and time-dependent Green-functions for open
systems. We obtain results for two-point correlators, the Green-functions
for scalar field and fi4 field theory to second order and for Green-functions
for fermions.
Description
165 F. : ill. ; 30 cm. (+ CD-Rom)
Keywords
Citation
Physique Théorique